1231031605716 has 72 divisors (see below), whose sum is σ = 3542256978624. Its totient is φ = 356820752640.

The previous prime is 1231031605709. The next prime is 1231031605721. The reversal of 1231031605716 is 6175061301321.

1231031605716 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 0 + 31 + 605 + 7 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67570581 + ... + 67588796.

It is an arithmetic number, because the mean of its divisors is an integer number (49198013592).

Almost surely, 2^{1231031605716} is an apocalyptic number.

It is an amenable number.

1231031605716 is an abundant number, since it is smaller than the sum of its proper divisors (2311225372908).

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

1231031605716 is a wasteful number, since it uses less digits than its factorization.

1231031605716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135159421 (or 135159416 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 1231031605716 in words is "one trillion, two hundred thirty-one billion, thirty-one million, six hundred five thousand, seven hundred sixteen".