15887251380 has 1152 divisors, whose sum is σ = 66718826496. Its totient is φ = 2767564800.

The previous prime is 15887251363. The next prime is 15887251399. The reversal of 15887251380 is 8315278851.

It is a super-2 number, since 2×15887251380² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 299759434 + ... + 299759486.

It is an arithmetic number, because the mean of its divisors is an integer number (57915648).

Almost surely, 2^15887251380 is an apocalyptic number.

15887251380 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 15887251380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33359413248).

15887251380 is an abundant number, since it is smaller than the sum of its proper divisors (50831575116).

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

15887251380 is a wasteful number, since it uses less digits than its factorization.

15887251380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 15887251380 in words is "fifteen billion, eight hundred eighty-seven million, two hundred fifty-one thousand, three hundred eighty".