15956866842 has 64 divisors (see below), whose sum is σ = 38638218240. Its totient is φ = 4288709376.

The previous prime is 15956866819. The next prime is 15956866853. The reversal of 15956866842 is 24866865951.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1756909 + ... + 1765967.

It is an arithmetic number, because the mean of its divisors is an integer number (603722160).

Almost surely, 2^15956866842 is an apocalyptic number.

15956866842 is an abundant number, since it is smaller than the sum of its proper divisors (22681351398).

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

15956866842 is a wasteful number, since it uses less digits than its factorization.

15956866842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555.

The product of its digits is 24883200, while the sum is 60.

The spelling of 15956866842 in words is "fifteen billion, nine hundred fifty-six million, eight hundred sixty-six thousand, eight hundred forty-two".