646744116031 has 16 divisors (see below), whose sum is σ = 703751455008. Its totient is φ = 590785488000.

The previous prime is 646744116023. The next prime is 646744116037. The reversal of 646744116031 is 130611447646.

It is a cyclic number.

It is not a de Polignac number, because 646744116031 - 2³ = 646744116023 is a prime.

It is a super-2 number, since 2×646744116031² (a number of 24 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 (646744116037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061881 + ... + 1555981.

It is an arithmetic number, because the mean of its divisors is an integer number (43984465938).

Almost surely, 2^646744116031 is an apocalyptic number.

646744116031 is a deficient number, since it is larger than the sum of its proper divisors (57007338977).

646744116031 is a wasteful number, since it uses less digits than its factorization.

646744116031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495162.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 646744116031 in words is "six hundred forty-six billion, seven hundred forty-four million, one hundred sixteen thousand, thirty-one".