645240365034 has 16 divisors (see below), whose sum is σ = 1292487706272. Its totient is φ = 214745625648.

The previous prime is 645240365027. The next prime is 645240365057. The reversal of 645240365034 is 430563042546.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 83619829 + ... + 83627544.

It is an arithmetic number, because the mean of its divisors is an integer number (80780481642).

Almost surely, 2^645240365034 is an apocalyptic number.

645240365034 is an abundant number, since it is smaller than the sum of its proper divisors (647247341238).

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

645240365034 is a wasteful number, since it uses less digits than its factorization.

645240365034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167248021.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 645240365034 in words is "six hundred forty-five billion, two hundred forty million, three hundred sixty-five thousand, thirty-four".