645233223216 has 40 divisors (see below), whose sum is σ = 1677078602560. Its totient is φ = 213758243136.

The previous prime is 645233223191. The next prime is 645233223301. The reversal of 645233223216 is 612322332546.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 41226406 + ... + 41242053.

It is an arithmetic number, because the mean of its divisors is an integer number (41926965064).

Almost surely, 2^645233223216 is an apocalyptic number.

It is an amenable number.

645233223216 is an abundant number, since it is smaller than the sum of its proper divisors (1031845379344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645233223216 is a wasteful number, since it uses less digits than its factorization.

645233223216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82468633 (or 82468627 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The spelling of 645233223216 in words is "six hundred forty-five billion, two hundred thirty-three million, two hundred twenty-three thousand, two hundred sixteen".