645204040315 has 64 divisors (see below), whose sum is σ = 838362055680. Its totient is φ = 475191360000.

The previous prime is 645204040309. The next prime is 645204040337. The reversal of 645204040315 is 513040402546.

645204040315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645204040315 - 2¹⁷ = 645203909243 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 369320272 + ... + 369322018.

It is an arithmetic number, because the mean of its divisors is an integer number (13099407120).

Almost surely, 2^645204040315 is an apocalyptic number.

645204040315 is a deficient number, since it is larger than the sum of its proper divisors (193158015365).

645204040315 is a wasteful number, since it uses less digits than its factorization.

645204040315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 645204040315 in words is "six hundred forty-five billion, two hundred four million, forty thousand, three hundred fifteen".