31612672717 has 4 divisors (see below), whose sum is σ = 31625952156. Its totient is φ = 31599393280.

The previous prime is 31612672697. The next prime is 31612672723. The reversal of 31612672717 is 71727621613.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12386354436 + 19226318281 = 111294^2 + 138659^2 .

It is a cyclic number.

It is not a de Polignac number, because 31612672717 - 2⁷ = 31612672589 is a prime.

It is a super-2 number, since 2×31612672717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31612672787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6636148 + ... + 6640909.

It is an arithmetic number, because the mean of its divisors is an integer number (7906488039).

Almost surely, 2^31612672717 is an apocalyptic number.

It is an amenable number.

31612672717 is a deficient number, since it is larger than the sum of its proper divisors (13279439).

31612672717 is a wasteful number, since it uses less digits than its factorization.

31612672717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13279438.

The product of its digits is 148176, while the sum is 43.

The spelling of 31612672717 in words is "thirty-one billion, six hundred twelve million, six hundred seventy-two thousand, seven hundred seventeen".