31660246400256 has 144 divisors (see below), whose sum is σ = 96645077777920. Its totient is φ = 10212982640640.

The previous prime is 31660246400249. The next prime is 31660246400257. The reversal of 31660246400256 is 65200464206613.

It is a happy number.

31660246400256 is a `hidden beast` number, since 3 + 16 + 602 + 4 + 6 + 4 + 0 + 0 + 25 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31660246400257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73664365 + ... + 74092908.

Almost surely, 2^{31660246400256} is an apocalyptic number.

31660246400256 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31660246400256 is an abundant number, since it is smaller than the sum of its proper divisors (64984831377664).

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

31660246400256 is a wasteful number, since it uses less digits than its factorization.

31660246400256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147757329 (or 147757309 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 31660246400256 in words is "thirty-one trillion, six hundred sixty billion, two hundred forty-six million, four hundred thousand, two hundred fifty-six".