15987087113664 has 112 divisors (see below), whose sum is σ = 43244363205792. Its totient is φ = 5210635702272.

The previous prime is 15987087113617. The next prime is 15987087113671. The reversal of 15987087113664 is 46631178078951.

It is a junction number, because it is equal to n+sod(n) for n = 15987087113595 and 15987087113604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300582 + ... + 5662554.

It is an arithmetic number, because the mean of its divisors is an integer number (386110385766).

Almost surely, 2^{15987087113664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15987087113664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21622181602896).

15987087113664 is an abundant number, since it is smaller than the sum of its proper divisors (27257276092128).

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

15987087113664 is a wasteful number, since it uses less digits than its factorization.

15987087113664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362334 (or 5362324 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 66.

The spelling of 15987087113664 in words is "fifteen trillion, nine hundred eighty-seven billion, eighty-seven million, one hundred thirteen thousand, six hundred sixty-four".