7545003444 has 384 divisors, whose sum is σ = 24269414400. Its totient is φ = 1998120960.

The previous prime is 7545003439. The next prime is 7545003449. The reversal of 7545003444 is 4443005457.

It is an interprime number because it is at equal distance from previous prime (7545003439) and next prime (7545003449).

It is a super-2 number, since 2×7545003444² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7545003399 and 7545003408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7545003449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17186577 + ... + 17187015.

It is an arithmetic number, because the mean of its divisors is an integer number (63201600).

Almost surely, 2^7545003444 is an apocalyptic number.

7545003444 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7545003444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12134707200).

7545003444 is an abundant number, since it is smaller than the sum of its proper divisors (16724410956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7545003444 is a wasteful number, since it uses less digits than its factorization.

7545003444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 36.

The square root of 7545003444 is about 86861.9792774721. The cubic root of 7545003444 is about 1961.3411829108.

The spelling of 7545003444 in words is "seven billion, five hundred forty-five million, three thousand, four hundred forty-four".