15752720772 has 36 divisors (see below), whose sum is σ = 41192462220. Its totient is φ = 5069840832.

The previous prime is 15752720771. The next prime is 15752720869. The reversal of 15752720772 is 27702725751.

15752720772 is a `hidden beast` number, since 1 + 57 + 527 + 2 + 0 + 7 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4315701636 + 11437019136 = 65694^2 + 106944^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (15752720771) 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 11 ways as a sum of consecutive naturals, for example, 7543363 + ... + 7545450.

Almost surely, 2^15752720772 is an apocalyptic number.

15752720772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15752720772 is an abundant number, since it is smaller than the sum of its proper divisors (25439741448).

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

15752720772 is a wasteful number, since it uses less digits than its factorization.

15752720772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15088852 (or 15088847 counting only the distinct ones).

The product of its (nonzero) digits is 480200, while the sum is 45.

The spelling of 15752720772 in words is "fifteen billion, seven hundred fifty-two million, seven hundred twenty thousand, seven hundred seventy-two".