15860861952 has 176 divisors, whose sum is σ = 47925346560. Its totient is φ = 4623187968.

The previous prime is 15860861941. The next prime is 15860861957. The reversal of 15860861952 is 25916806851.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 15860861895 and 15860861904.

It is not an unprimeable number, because it can be changed into a prime (15860861957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748333 + ... + 769235.

Almost surely, 2^15860861952 is an apocalyptic number.

15860861952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15860861952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23962673280).

15860861952 is an abundant number, since it is smaller than the sum of its proper divisors (32064484608).

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

15860861952 is a wasteful number, since it uses less digits than its factorization.

15860861952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20958 (or 20940 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The spelling of 15860861952 in words is "fifteen billion, eight hundred sixty million, eight hundred sixty-one thousand, nine hundred fifty-two".