31988393995068 has 432 divisors, whose sum is σ = 102489486887424. Its totient is φ = 8223526840320.

The previous prime is 31988393995049. The next prime is 31988393995087. The reversal of 31988393995068 is 86059939388913.

31988393995068 is a `hidden beast` number, since 3 + 1 + 9 + 88 + 393 + 9 + 95 + 0 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (31988393995049) and next prime (31988393995087).

It is a super-3 number, since 3×31988393995068³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4132329678 + ... + 4132337418.

Almost surely, 2^{31988393995068} 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 31988393995068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51244743443712).

31988393995068 is an abundant number, since it is smaller than the sum of its proper divisors (70501092892356).

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

31988393995068 is a wasteful number, since it uses less digits than its factorization.

31988393995068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282 (or 10260 counting only the distinct ones).

The product of its (nonzero) digits is 2720977920, while the sum is 81.

The spelling of 31988393995068 in words is "thirty-one trillion, nine hundred eighty-eight billion, three hundred ninety-three million, nine hundred ninety-five thousand, sixty-eight".