7245172620 has 288 divisors, whose sum is σ = 25646519808. Its totient is φ = 1621472256.

The previous prime is 7245172619. The next prime is 7245172651. The reversal of 7245172620 is 262715427.

It is a happy number.

7245172620 is a `hidden beast` number, since 7 + 24 + 5 + 1 + 7 + 2 + 620 = 666.

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

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 20879287 + ... + 20879633.

It is an arithmetic number, because the mean of its divisors is an integer number (89050416).

Almost surely, 2^7245172620 is an apocalyptic number.

7245172620 is a gapful number since it is divisible by the number (70) 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 7245172620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12823259904).

7245172620 is an abundant number, since it is smaller than the sum of its proper divisors (18401347188).

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

7245172620 is a wasteful number, since it uses less digits than its factorization.

7245172620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 7245172620 is about 85118.5797578883. The cubic root of 7245172620 is about 1935.0086572936.

The spelling of 7245172620 in words is "seven billion, two hundred forty-five million, one hundred seventy-two thousand, six hundred twenty".