645215264116233 has 16 divisors (see below), whose sum is σ = 911089172438016. Its totient is φ = 405300698027280.

The previous prime is 645215264116217. The next prime is 645215264116309. The reversal of 645215264116233 is 332611462512546.

It is not a de Polignac number, because 645215264116233 - 2⁴ = 645215264116217 is a prime.

It is a super-2 number, since 2×645215264116233² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645215264116133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69783173413 + ... + 69783182658.

It is an arithmetic number, because the mean of its divisors is an integer number (56943073277376).

Almost surely, 2^{645215264116233} is an apocalyptic number.

It is an amenable number.

645215264116233 is a deficient number, since it is larger than the sum of its proper divisors (265873908321783).

645215264116233 is a wasteful number, since it uses less digits than its factorization.

645215264116233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139566356164.

The product of its digits is 6220800, while the sum is 51.

The spelling of 645215264116233 in words is "six hundred forty-five trillion, two hundred fifteen billion, two hundred sixty-four million, one hundred sixteen thousand, two hundred thirty-three".