645300445605 has 16 divisors (see below), whose sum is σ = 1054448388864. Its totient is φ = 336837679040.

The previous prime is 645300445591. The next prime is 645300445633. The reversal of 645300445605 is 506544003546.

It is not a de Polignac number, because 645300445605 - 2²⁵ = 645266891173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457659186 + ... + 457660595.

It is an arithmetic number, because the mean of its divisors is an integer number (65903024304).

Almost surely, 2^645300445605 is an apocalyptic number.

It is an amenable number.

645300445605 is a deficient number, since it is larger than the sum of its proper divisors (409147943259).

645300445605 is a wasteful number, since it uses less digits than its factorization.

645300445605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915319836.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 645300445605 in words is "six hundred forty-five billion, three hundred million, four hundred forty-five thousand, six hundred five".