15987058668 has 48 divisors (see below), whose sum is σ = 47369064960. Its totient is φ = 4567730832.

The previous prime is 15987058657. The next prime is 15987058673. The reversal of 15987058668 is 86685078951.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 10572696 + ... + 10574207.

It is an arithmetic number, because the mean of its divisors is an integer number (986855520).

Almost surely, 2^15987058668 is an apocalyptic number.

15987058668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15987058668 is an abundant number, since it is smaller than the sum of its proper divisors (31382006292).

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

15987058668 is a wasteful number, since it uses less digits than its factorization.

15987058668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21146923 (or 21146915 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 63.

The spelling of 15987058668 in words is "fifteen billion, nine hundred eighty-seven million, fifty-eight thousand, six hundred sixty-eight".