645046644625004 has 12 divisors (see below), whose sum is σ = 1188243819046200. Its totient is φ = 305548410611808.

The previous prime is 645046644624997. The next prime is 645046644625027. The reversal of 645046644625004 is 400526446640546.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4243727925089 + ... + 4243727925240.

It is an arithmetic number, because the mean of its divisors is an integer number (99020318253850).

Almost surely, 2^{645046644625004} is an apocalyptic number.

It is an amenable number.

645046644625004 is a deficient number, since it is larger than the sum of its proper divisors (543197174421196).

645046644625004 is a wasteful number, since it uses less digits than its factorization.

645046644625004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8487455850352 (or 8487455850350 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 56.

The spelling of 645046644625004 in words is "six hundred forty-five trillion, forty-six billion, six hundred forty-four million, six hundred twenty-five thousand, four".