15972649632 has 48 divisors (see below), whose sum is σ = 46586897280. Its totient is φ = 5324216256.

The previous prime is 15972649631. The next prime is 15972649633. The reversal of 15972649632 is 23694627951.

15972649632 is a `hidden beast` number, since 1 + 59 + 72 + 6 + 496 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (15972649631) and next prime (15972649633).

It is a tau number, because it is divible by the number of its divisors (48).

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

It is not an unprimeable number, because it can be changed into a prime (15972649631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9242568 + ... + 9244295.

It is an arithmetic number, because the mean of its divisors is an integer number (970560360).

Almost surely, 2^15972649632 is an apocalyptic number.

15972649632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15972649632 is an abundant number, since it is smaller than the sum of its proper divisors (30614247648).

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

15972649632 is a wasteful number, since it uses less digits than its factorization.

15972649632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18486882 (or 18486868 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 15972649632 in words is "fifteen billion, nine hundred seventy-two million, six hundred forty-nine thousand, six hundred thirty-two".