31127494780 has 24 divisors (see below), whose sum is σ = 65384021808. Its totient is φ = 12447896448.

The previous prime is 31127494777. The next prime is 31127494817. The reversal of 31127494780 is 8749472113.

It is a self number, because there is not a number n which added to its sum of digits gives 31127494780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110674 + ... + 272953.

It is an arithmetic number, because the mean of its divisors is an integer number (2724334242).

Almost surely, 2^31127494780 is an apocalyptic number.

It is an amenable number.

31127494780 is an abundant number, since it is smaller than the sum of its proper divisors (34256527028).

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

31127494780 is a wasteful number, since it uses less digits than its factorization.

31127494780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387693 (or 387691 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 31127494780 in words is "thirty-one billion, one hundred twenty-seven million, four hundred ninety-four thousand, seven hundred eighty".