31123046660 has 12 divisors (see below), whose sum is σ = 65358398028. Its totient is φ = 12449218656.

The previous prime is 31123046641. The next prime is 31123046681. The reversal of 31123046660 is 6664032113.

It can be written as a sum of positive squares in 2 ways, for example, as 15771341056 + 15351705604 = 125584^2 + 123902^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778076147 + ... + 778076186.

It is an arithmetic number, because the mean of its divisors is an integer number (5446533169).

Almost surely, 2^31123046660 is an apocalyptic number.

It is an amenable number.

31123046660 is an abundant number, since it is smaller than the sum of its proper divisors (34235351368).

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

31123046660 is a wasteful number, since it uses less digits than its factorization.

31123046660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556152342 (or 1556152340 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 31123046660 its reverse (6664032113), we get a palindrome (37787078773).

The spelling of 31123046660 in words is "thirty-one billion, one hundred twenty-three million, forty-six thousand, six hundred sixty".