15625748772 has 48 divisors (see below), whose sum is σ = 41818022400. Its totient is φ = 5040563040.

The previous prime is 15625748711. The next prime is 15625748791. The reversal of 15625748772 is 27784752651.

15625748772 is a `hidden beast` number, since 1 + 5 + 62 + 574 + 8 + 7 + 7 + 2 = 666.

It is a super-3 number, since 3×15625748772³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2330247 + ... + 2336942.

It is an arithmetic number, because the mean of its divisors is an integer number (871208800).

Almost surely, 2^15625748772 is an apocalyptic number.

15625748772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15625748772 is an abundant number, since it is smaller than the sum of its proper divisors (26192273628).

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

15625748772 is a wasteful number, since it uses less digits than its factorization.

15625748772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667233 (or 4667225 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The spelling of 15625748772 in words is "fifteen billion, six hundred twenty-five million, seven hundred forty-eight thousand, seven hundred seventy-two".