645360015 has 16 divisors (see below), whose sum is σ = 1065885696. Its totient is φ = 333088800.

The previous prime is 645360007. The next prime is 645360017. The reversal of 645360015 is 510063546.

It is not a de Polignac number, because 645360015 - 2³ = 645360007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645360017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693471 + ... + 694400.

It is an arithmetic number, because the mean of its divisors is an integer number (66617856).

Almost surely, 2^645360015 is an apocalyptic number.

645360015 is a deficient number, since it is larger than the sum of its proper divisors (420525681).

645360015 is a wasteful number, since it uses less digits than its factorization.

645360015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387910.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 645360015 is about 25403.9369980324. The cubic root of 645360015 is about 864.1729830363.

The spelling of 645360015 in words is "six hundred forty-five million, three hundred sixty thousand, fifteen".