31516660104 has 32 divisors (see below), whose sum is σ = 79967649120. Its totient is φ = 10348753536.

The previous prime is 31516660103. The next prime is 31516660121. The reversal of 31516660104 is 40106661513.

It is a super-2 number, since 2×31516660104² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31516660103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9798349 + ... + 9801564.

It is an arithmetic number, because the mean of its divisors is an integer number (2498989035).

Almost surely, 2^31516660104 is an apocalyptic number.

It is an amenable number.

31516660104 is an abundant number, since it is smaller than the sum of its proper divisors (48450989016).

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

31516660104 is a wasteful number, since it uses less digits than its factorization.

31516660104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19599989 (or 19599985 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 31516660104 in words is "thirty-one billion, five hundred sixteen million, six hundred sixty thousand, one hundred four".