645076675 has 24 divisors (see below), whose sum is σ = 834307712. Its totient is φ = 494208000.

The previous prime is 645076673. The next prime is 645076687. The reversal of 645076675 is 576670546.

645076675 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 645076675 - 2¹ = 645076673 is a prime.

It is a super-2 number, since 2×645076675² = 832247833258111250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645076673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70885 + ... + 79465.

Almost surely, 2^645076675 is an apocalyptic number.

645076675 is a deficient number, since it is larger than the sum of its proper divisors (189231037).

645076675 is a wasteful number, since it uses less digits than its factorization.

645076675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8719 (or 8714 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The square root of 645076675 is about 25398.3596911297. The cubic root of 645076675 is about 864.0464951795.

The spelling of 645076675 in words is "six hundred forty-five million, seventy-six thousand, six hundred seventy-five".