645622166504 has 32 divisors (see below), whose sum is σ = 1383586980480. Its totient is φ = 276673032384.

The previous prime is 645622166489. The next prime is 645622166507. The reversal of 645622166504 is 405661226546.

It is not an unprimeable number, because it can be changed into a prime (645622166507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252434 + ... + 1164030.

It is an arithmetic number, because the mean of its divisors is an integer number (43237093140).

Almost surely, 2^645622166504 is an apocalyptic number.

It is an amenable number.

645622166504 is an abundant number, since it is smaller than the sum of its proper divisors (737964813976).

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

645622166504 is a wasteful number, since it uses less digits than its factorization.

645622166504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924257 (or 924253 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 645622166504 in words is "six hundred forty-five billion, six hundred twenty-two million, one hundred sixty-six thousand, five hundred four".