31876955136 has 880 divisors, whose sum is σ = 113848834176. Its totient is φ = 8790736896.

The previous prime is 31876955107. The next prime is 31876955141. The reversal of 31876955136 is 63155967813.

31876955136 is a `hidden beast` number, since 3 + 1 + 87 + 6 + 9 + 551 + 3 + 6 = 666.

It is a super-2 number, since 2×31876955136² (a number of 22 digits) contains 22 as substring.

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

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, 678233065 + ... + 678233111.

Almost surely, 2^31876955136 is an apocalyptic number.

31876955136 is a gapful number since it is divisible by the number (36) 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 31876955136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56924417088).

31876955136 is an abundant number, since it is smaller than the sum of its proper divisors (81971879040).

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

31876955136 is a wasteful number, since it uses less digits than its factorization.

31876955136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 119 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 31876955136 in words is "thirty-one billion, eight hundred seventy-six million, nine hundred fifty-five thousand, one hundred thirty-six".