31343645613 has 40 divisors (see below), whose sum is σ = 49888185248. Its totient is φ = 17493954912.

The previous prime is 31343645591. The next prime is 31343645647. The reversal of 31343645613 is 31654634313.

It is a happy number.

It is not a de Polignac number, because 31343645613 - 2⁶ = 31343645549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343640613) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 259131 + ... + 360327.

Almost surely, 2^31343645613 is an apocalyptic number.

It is an amenable number.

31343645613 is a deficient number, since it is larger than the sum of its proper divisors (18544539635).

31343645613 is an equidigital number, since it uses as much as digits as its factorization.

31343645613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101271 (or 101250 counting only the distinct ones).

The product of its digits is 233280, while the sum is 39.

The spelling of 31343645613 in words is "thirty-one billion, three hundred forty-three million, six hundred forty-five thousand, six hundred thirteen".