31798019916464 has 60 divisors (see below), whose sum is σ = 66518765281008. Its totient is φ = 14718466176000.

The previous prime is 31798019916433. The next prime is 31798019916469. The reversal of 31798019916464 is 46461991089713.

It is a super-2 number, since 2×31798019916464² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a junction number, because it is equal to n+sod(n) for n = 31798019916394 and 31798019916403.

It is not an unprimeable number, because it can be changed into a prime (31798019916469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56084612 + ... + 56648739.

Almost surely, 2^{31798019916464} is an apocalyptic number.

31798019916464 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31798019916464 is an abundant number, since it is smaller than the sum of its proper divisors (34720745364544).

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

31798019916464 is a wasteful number, since it uses less digits than its factorization.

31798019916464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112733454 (or 112733431 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 68.

The spelling of 31798019916464 in words is "thirty-one trillion, seven hundred ninety-eight billion, nineteen million, nine hundred sixteen thousand, four hundred sixty-four".