645612310536 has 32 divisors (see below), whose sum is σ = 1614148875360. Its totient is φ = 215188356992.

The previous prime is 645612310501. The next prime is 645612310661. The reversal of 645612310536 is 635013216546.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646965 + ... + 1307588.

It is an arithmetic number, because the mean of its divisors is an integer number (50442152355).

Almost surely, 2^645612310536 is an apocalyptic number.

It is an amenable number.

645612310536 is an abundant number, since it is smaller than the sum of its proper divisors (968536564824).

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

645612310536 is a wasteful number, since it uses less digits than its factorization.

645612310536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968325 (or 1968321 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 645612310536 in words is "six hundred forty-five billion, six hundred twelve million, three hundred ten thousand, five hundred thirty-six".