31491462857748 has 12 divisors (see below), whose sum is σ = 73480080001440. Its totient is φ = 10497154285912.

The previous prime is 31491462857719. The next prime is 31491462857779. The reversal of 31491462857748 is 84775826419413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312144285728 + ... + 1312144285751.

It is an arithmetic number, because the mean of its divisors is an integer number (6123340000120).

Almost surely, 2^{31491462857748} is an apocalyptic number.

It is an amenable number.

31491462857748 is an abundant number, since it is smaller than the sum of its proper divisors (41988617143692).

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

31491462857748 is a wasteful number, since it uses less digits than its factorization.

31491462857748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624288571486 (or 2624288571484 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 69.

The spelling of 31491462857748 in words is "thirty-one trillion, four hundred ninety-one billion, four hundred sixty-two million, eight hundred fifty-seven thousand, seven hundred forty-eight".