2131187363688 has 32 divisors (see below), whose sum is σ = 5366299125600. Its totient is φ = 705285025728.

The previous prime is 2131187363651. The next prime is 2131187363713. The reversal of 2131187363688 is 8863637811312.

It is a super-2 number, since 2×2131187363688² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319419231 + ... + 319425902.

It is an arithmetic number, because the mean of its divisors is an integer number (167696847675).

Almost surely, 2^{2131187363688} is an apocalyptic number.

It is an amenable number.

2131187363688 is an abundant number, since it is smaller than the sum of its proper divisors (3235111761912).

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

2131187363688 is a wasteful number, since it uses less digits than its factorization.

2131187363688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638845281 (or 638845277 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The spelling of 2131187363688 in words is "two trillion, one hundred thirty-one billion, one hundred eighty-seven million, three hundred sixty-three thousand, six hundred eighty-eight".