612910040731 has 4 divisors (see below), whose sum is σ = 617588743464. Its totient is φ = 608231338000.

The previous prime is 612910040713. The next prime is 612910040741. The reversal of 612910040731 is 137040019216.

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

It is a cyclic number.

It is not a de Polignac number, because 612910040731 - 2³⁹ = 63154226843 is a prime.

It is a super-2 number, since 2×612910040731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612910040741) 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, 2339351170 + ... + 2339351431.

It is an arithmetic number, because the mean of its divisors is an integer number (154397185866).

Almost surely, 2^612910040731 is an apocalyptic number.

612910040731 is a deficient number, since it is larger than the sum of its proper divisors (4678702733).

612910040731 is a wasteful number, since it uses less digits than its factorization.

612910040731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678702732.

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

Adding to 612910040731 its reverse (137040019216), we get a palindrome (749950059947).

The spelling of 612910040731 in words is "six hundred twelve billion, nine hundred ten million, forty thousand, seven hundred thirty-one".