31194938845 has 24 divisors (see below), whose sum is σ = 43715114424. Its totient is φ = 21307539456.

The previous prime is 31194938837. The next prime is 31194938867. The reversal of 31194938845 is 54883949113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2524660516 + 28670278329 = 50246^2 + 169323^2 .

It is not a de Polignac number, because 31194938845 - 2³ = 31194938837 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 184752 + ... + 310681.

It is an arithmetic number, because the mean of its divisors is an integer number (1821463101).

Almost surely, 2^31194938845 is an apocalyptic number.

31194938845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31194938845 is a deficient number, since it is larger than the sum of its proper divisors (12520175579).

31194938845 is a wasteful number, since it uses less digits than its factorization.

31194938845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495709 (or 495702 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 55.

The spelling of 31194938845 in words is "thirty-one billion, one hundred ninety-four million, nine hundred thirty-eight thousand, eight hundred forty-five".