31639898889996 has 24 divisors (see below), whose sum is σ = 73830300384624. Its totient is φ = 10546080157440.

The previous prime is 31639898889961. The next prime is 31639898890009. The reversal of 31639898889996 is 69998889893613.

It is a super-2 number, since 2×31639898889996² (a number of 28 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, 68862225 + ... + 69320168.

It is an arithmetic number, because the mean of its divisors is an integer number (3076262516026).

Almost surely, 2^{31639898889996} is an apocalyptic number.

It is an amenable number.

31639898889996 is an abundant number, since it is smaller than the sum of its proper divisors (42190401494628).

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

31639898889996 is a wasteful number, since it uses less digits than its factorization.

31639898889996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138201481 (or 138201479 counting only the distinct ones).

The product of its digits is 78364164096, while the sum is 96.

The spelling of 31639898889996 in words is "thirty-one trillion, six hundred thirty-nine billion, eight hundred ninety-eight million, eight hundred eighty-nine thousand, nine hundred ninety-six".