31125660780 has 48 divisors (see below), whose sum is σ = 87564927744. Its totient is φ = 8260835520.

The previous prime is 31125660779. The next prime is 31125660803. The reversal of 31125660780 is 8706652113.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216632 + ... + 1241951.

It is an arithmetic number, because the mean of its divisors is an integer number (1824269328).

Almost surely, 2^31125660780 is an apocalyptic number.

31125660780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31125660780 is an abundant number, since it is smaller than the sum of its proper divisors (56439266964).

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

31125660780 is a wasteful number, since it uses less digits than its factorization.

31125660780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458806 (or 2458804 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 31125660780 in words is "thirty-one billion, one hundred twenty-five million, six hundred sixty thousand, seven hundred eighty".