15915661032 has 16 divisors (see below), whose sum is σ = 39789152640. Its totient is φ = 5305220336.

The previous prime is 15915661031. The next prime is 15915661039. The reversal of 15915661032 is 23016651951.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15915661031) 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 3 ways as a sum of consecutive naturals, for example, 331576248 + ... + 331576295.

It is an arithmetic number, because the mean of its divisors is an integer number (2486822040).

Almost surely, 2^15915661032 is an apocalyptic number.

15915661032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15915661032 is an abundant number, since it is smaller than the sum of its proper divisors (23873491608).

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

15915661032 is a wasteful number, since it uses less digits than its factorization.

15915661032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663152552 (or 663152548 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 15915661032 in words is "fifteen billion, nine hundred fifteen million, six hundred sixty-one thousand, thirty-two".