646326116523 has 12 divisors (see below), whose sum is σ = 974172697680. Its totient is φ = 412149987216.

The previous prime is 646326116521. The next prime is 646326116531. The reversal of 646326116523 is 325611623646.

646326116523 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 2 + 6 + 116 + 523 = 666.

It is not a de Polignac number, because 646326116523 - 2¹ = 646326116521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646326116521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561173988 + ... + 1561174401.

It is an arithmetic number, because the mean of its divisors is an integer number (81181058140).

Almost surely, 2^646326116523 is an apocalyptic number.

646326116523 is a deficient number, since it is larger than the sum of its proper divisors (327846581157).

646326116523 is a wasteful number, since it uses less digits than its factorization.

646326116523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122348418 (or 3122348415 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 646326116523 in words is "six hundred forty-six billion, three hundred twenty-six million, one hundred sixteen thousand, five hundred twenty-three".