31668678056 has 8 divisors (see below), whose sum is σ = 59378771370. Its totient is φ = 15834339024.

The previous prime is 31668678053. The next prime is 31668678109. The reversal of 31668678056 is 65087686613.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29595697156 + 2072980900 = 172034^2 + 45530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31668677992 and 31668678010.

It is not an unprimeable number, because it can be changed into a prime (31668678053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979292371 + ... + 1979292386.

Almost surely, 2^31668678056 is an apocalyptic number.

It is an amenable number.

31668678056 is a deficient number, since it is larger than the sum of its proper divisors (27710093314).

31668678056 is a wasteful number, since it uses less digits than its factorization.

31668678056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958584763 (or 3958584759 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 31668678056 in words is "thirty-one billion, six hundred sixty-eight million, six hundred seventy-eight thousand, fifty-six".