15861952856 has 16 divisors (see below), whose sum is σ = 31306486200. Its totient is φ = 7513556544.

The previous prime is 15861952853. The next prime is 15861952871. The reversal of 15861952856 is 65825916851.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15861952853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52177325 + ... + 52177628.

Almost surely, 2^15861952856 is an apocalyptic number.

It is an amenable number.

15861952856 is a deficient number, since it is larger than the sum of its proper divisors (15444533344).

15861952856 is a wasteful number, since it uses less digits than its factorization.

15861952856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104354978 (or 104354974 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 56.

The spelling of 15861952856 in words is "fifteen billion, eight hundred sixty-one million, nine hundred fifty-two thousand, eight hundred fifty-six".