31613117461 has 4 divisors (see below), whose sum is σ = 31665718924. Its totient is φ = 31560516000.

The previous prime is 31613117443. The next prime is 31613117479. The reversal of 31613117461 is 16471131613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16471131613 = 277 ⋅59462569.

It is an interprime number because it is at equal distance from previous prime (31613117443) and next prime (31613117479).

It can be written as a sum of positive squares in 2 ways, for example, as 21010502500 + 10602614961 = 144950^2 + 102969^2 .

It is a cyclic number.

It is not a de Polignac number, because 31613117461 - 2²³ = 31604728853 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 (31613117561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26299830 + ... + 26301031.

It is an arithmetic number, because the mean of its divisors is an integer number (7916429731).

Almost surely, 2^31613117461 is an apocalyptic number.

It is an amenable number.

31613117461 is a deficient number, since it is larger than the sum of its proper divisors (52601463).

31613117461 is an equidigital number, since it uses as much as digits as its factorization.

31613117461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52601462.

The product of its digits is 9072, while the sum is 34.

The spelling of 31613117461 in words is "thirty-one billion, six hundred thirteen million, one hundred seventeen thousand, four hundred sixty-one".