645235011564 has 96 divisors (see below), whose sum is σ = 1785928994304. Its totient is φ = 178732984320.

The previous prime is 645235011563. The next prime is 645235011593. The reversal of 645235011564 is 465110532546.

It is not an unprimeable number, because it can be changed into a prime (645235011563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1648549 + ... + 2002044.

It is an arithmetic number, because the mean of its divisors is an integer number (18603427024).

Almost surely, 2^645235011564 is an apocalyptic number.

It is an amenable number.

645235011564 is an abundant number, since it is smaller than the sum of its proper divisors (1140693982740).

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

645235011564 is a wasteful number, since it uses less digits than its factorization.

645235011564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650727 (or 3650725 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 645235011564 in words is "six hundred forty-five billion, two hundred thirty-five million, eleven thousand, five hundred sixty-four".