645566563034 has 16 divisors (see below), whose sum is σ = 992422005120. Its totient is φ = 314857682880.

The previous prime is 645566563021. The next prime is 645566563091. The reversal of 645566563034 is 430365665546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24600527 + ... + 24626754.

It is an arithmetic number, because the mean of its divisors is an integer number (62026375320).

Almost surely, 2^645566563034 is an apocalyptic number.

645566563034 is a deficient number, since it is larger than the sum of its proper divisors (346855442086).

645566563034 is a wasteful number, since it uses less digits than its factorization.

645566563034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49227445.

The product of its (nonzero) digits is 23328000, while the sum is 53.

The spelling of 645566563034 in words is "six hundred forty-five billion, five hundred sixty-six million, five hundred sixty-three thousand, thirty-four".