31663216612 has 6 divisors (see below), whose sum is σ = 55410629078. Its totient is φ = 15831608304.

The previous prime is 31663216597. The next prime is 31663216633. The reversal of 31663216612 is 21661236613.

It can be written as a sum of positive squares in only one way, i.e., 19750367296 + 11912849316 = 140536^2 + 109146^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3957902073 + ... + 3957902080.

Almost surely, 2^31663216612 is an apocalyptic number.

It is an amenable number.

31663216612 is a deficient number, since it is larger than the sum of its proper divisors (23747412466).

31663216612 is a wasteful number, since it uses less digits than its factorization.

31663216612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7915804157 (or 7915804155 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The spelling of 31663216612 in words is "thirty-one billion, six hundred sixty-three million, two hundred sixteen thousand, six hundred twelve".