645135767584 has 96 divisors (see below), whose sum is σ = 1583712127872. Its totient is φ = 251320320000.

The previous prime is 645135767513. The next prime is 645135767593. The reversal of 645135767584 is 485767531546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35474974 + ... + 35493154.

It is an arithmetic number, because the mean of its divisors is an integer number (16497001332).

Almost surely, 2^645135767584 is an apocalyptic number.

It is an amenable number.

645135767584 is an abundant number, since it is smaller than the sum of its proper divisors (938576360288).

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

645135767584 is a wasteful number, since it uses less digits than its factorization.

645135767584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32610 (or 32602 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 61.

The spelling of 645135767584 in words is "six hundred forty-five billion, one hundred thirty-five million, seven hundred sixty-seven thousand, five hundred eighty-four".