31568664661400 has 96 divisors (see below), whose sum is σ = 79368127525440. Its totient is φ = 11631808296960.

The previous prime is 31568664661367. The next prime is 31568664661411. The reversal of 31568664661400 is 416646686513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98615747 + ... + 98935346.

It is an arithmetic number, because the mean of its divisors is an integer number (826751328390).

Almost surely, 2^{31568664661400} is an apocalyptic number.

It is an amenable number.

31568664661400 is an abundant number, since it is smaller than the sum of its proper divisors (47799462864040).

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

31568664661400 is a wasteful number, since it uses less digits than its factorization.

31568664661400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197551173 (or 197551164 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 31568664661400 in words is "thirty-one trillion, five hundred sixty-eight billion, six hundred sixty-four million, six hundred sixty-one thousand, four hundred".