31506730404 has 12 divisors (see below), whose sum is σ = 73515704304. Its totient is φ = 10502243464.

The previous prime is 31506730351. The next prime is 31506730441. The reversal of 31506730404 is 40403760513.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×31506730404³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312780422 + ... + 1312780445.

It is an arithmetic number, because the mean of its divisors is an integer number (6126308692).

Almost surely, 2^31506730404 is an apocalyptic number.

It is an amenable number.

31506730404 is an abundant number, since it is smaller than the sum of its proper divisors (42008973900).

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

31506730404 is a wasteful number, since it uses less digits than its factorization.

31506730404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625560874 (or 2625560872 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 31506730404 in words is "thirty-one billion, five hundred six million, seven hundred thirty thousand, four hundred four".