15956328640 has 84 divisors (see below), whose sum is σ = 44199480816. Its totient is φ = 5470735872.

The previous prime is 15956328631. The next prime is 15956328659. The reversal of 15956328640 is 4682365951.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 11 ways as a sum of consecutive naturals, for example, 493132 + ... + 524491.

Almost surely, 2^15956328640 is an apocalyptic number.

15956328640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15956328640 is an abundant number, since it is smaller than the sum of its proper divisors (28243152176).

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

15956328640 is a wasteful number, since it uses less digits than its factorization.

15956328640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017654 (or 1017637 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 15956328640 in words is "fifteen billion, nine hundred fifty-six million, three hundred twenty-eight thousand, six hundred forty".