645587675 has 6 divisors (see below), whose sum is σ = 800528748. Its totient is φ = 516470120.

The previous prime is 645587669. The next prime is 645587689. The reversal of 645587675 is 576785546.

It is not a de Polignac number, because 645587675 - 2⁴ = 645587659 is a prime.

It is a super-2 number, since 2×645587675² = 833566892223811250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12911729 + ... + 12911778.

It is an arithmetic number, because the mean of its divisors is an integer number (133421458).

Almost surely, 2^645587675 is an apocalyptic number.

645587675 is a deficient number, since it is larger than the sum of its proper divisors (154941073).

645587675 is a wasteful number, since it uses less digits than its factorization.

645587675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25823517 (or 25823512 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 53.

The square root of 645587675 is about 25408.4174044744. The cubic root of 645587675 is about 864.2745875606.

The spelling of 645587675 in words is "six hundred forty-five million, five hundred eighty-seven thousand, six hundred seventy-five".