7545721200 has 120 divisors (see below), whose sum is σ = 24393639600. Its totient is φ = 1993697280.

The previous prime is 7545721121. The next prime is 7545721217. The reversal of 7545721200 is 21275457.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101956 + ... + 159644.

It is an arithmetic number, because the mean of its divisors is an integer number (203280330).

Almost surely, 2^7545721200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7545721200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12196819800).

7545721200 is an abundant number, since it is smaller than the sum of its proper divisors (16847918400).

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

7545721200 is a wasteful number, since it uses less digits than its factorization.

7545721200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57819 (or 57808 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 7545721200 is about 86866.1107682392. The cubic root of 7545721200 is about 1961.4033750523.

Adding to 7545721200 its reverse (21275457), we get a palindrome (7566996657).

The spelling of 7545721200 in words is "seven billion, five hundred forty-five million, seven hundred twenty-one thousand, two hundred".