31906355980 has 12 divisors (see below), whose sum is σ = 67003347600. Its totient is φ = 12762542384.

The previous prime is 31906355963. The next prime is 31906355983. The reversal of 31906355980 is 8955360913.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31906355983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797658880 + ... + 797658919.

It is an arithmetic number, because the mean of its divisors is an integer number (5583612300).

Almost surely, 2^31906355980 is an apocalyptic number.

It is an amenable number.

31906355980 is an abundant number, since it is smaller than the sum of its proper divisors (35096991620).

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

31906355980 is a wasteful number, since it uses less digits than its factorization.

31906355980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595317808 (or 1595317806 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 31906355980 in words is "thirty-one billion, nine hundred six million, three hundred fifty-five thousand, nine hundred eighty".