645360402 has 16 divisors (see below), whose sum is σ = 1302144480. Its totient is φ = 213216192.

The previous prime is 645360379. The next prime is 645360437. The reversal of 645360402 is 204063546.

It is a self number, because there is not a number n which added to its sum of digits gives 645360402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475252 + ... + 476607.

It is an arithmetic number, because the mean of its divisors is an integer number (81384030).

Almost surely, 2^645360402 is an apocalyptic number.

645360402 is an abundant number, since it is smaller than the sum of its proper divisors (656784078).

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

645360402 is a wasteful number, since it uses less digits than its factorization.

645360402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951977.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 645360402 is about 25403.9446149609. The cubic root of 645360402 is about 864.1731557745.

The spelling of 645360402 in words is "six hundred forty-five million, three hundred sixty thousand, four hundred two".