31555500064 has 48 divisors (see below), whose sum is σ = 67934674080. Its totient is φ = 14309109760.

The previous prime is 31555500043. The next prime is 31555500083. The reversal of 31555500064 is 46000555513.

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, 40512 + ... + 254464.

It is an arithmetic number, because the mean of its divisors is an integer number (1415305710).

Almost surely, 2^31555500064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31555500064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33967337040).

31555500064 is an abundant number, since it is smaller than the sum of its proper divisors (36379174016).

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

31555500064 is a wasteful number, since it uses less digits than its factorization.

31555500064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214393 (or 214385 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 31555500064 in words is "thirty-one billion, five hundred fifty-five million, five hundred thousand, sixty-four".