31700450780 has 24 divisors (see below), whose sum is σ = 68370163008. Its totient is φ = 12337472448.

The previous prime is 31700450767. The next prime is 31700450809. The reversal of 31700450780 is 8705400713.

It is a self number, because there is not a number n which added to its sum of digits gives 31700450780.

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 7 ways as a sum of consecutive naturals, for example, 21418484 + ... + 21419963.

It is an arithmetic number, because the mean of its divisors is an integer number (2848756792).

Almost surely, 2^31700450780 is an apocalyptic number.

It is an amenable number.

31700450780 is an abundant number, since it is smaller than the sum of its proper divisors (36669712228).

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

31700450780 is a wasteful number, since it uses less digits than its factorization.

31700450780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42838493 (or 42838491 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 31700450780 in words is "thirty-one billion, seven hundred million, four hundred fifty thousand, seven hundred eighty".