15861886560 has 480 divisors, whose sum is σ = 62250515712. Its totient is φ = 3777269760.

The previous prime is 15861886553. The next prime is 15861886577. The reversal of 15861886560 is 6568816851.

15861886560 is a `hidden beast` number, since 1 + 586 + 1 + 8 + 8 + 6 + 56 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 15861886497 and 15861886506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5221362 + ... + 5224398.

Almost surely, 2^15861886560 is an apocalyptic number.

15861886560 is a gapful number since it is divisible by the number (10) 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 15861886560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31125257856).

15861886560 is an abundant number, since it is smaller than the sum of its proper divisors (46388629152).

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

15861886560 is a wasteful number, since it uses less digits than its factorization.

15861886560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108 (or 3091 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 15861886560 in words is "fifteen billion, eight hundred sixty-one million, eight hundred eighty-six thousand, five hundred sixty".