645413372675 has 12 divisors (see below), whose sum is σ = 803747407320. Its totient is φ = 514114681920.

The previous prime is 645413372641. The next prime is 645413372699. The reversal of 645413372675 is 576273314546.

It is not a de Polignac number, because 645413372675 - 2²² = 645409178371 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55394465 + ... + 55406114.

It is an arithmetic number, because the mean of its divisors is an integer number (66978950610).

Almost surely, 2^645413372675 is an apocalyptic number.

645413372675 is a deficient number, since it is larger than the sum of its proper divisors (158334034645).

645413372675 is a wasteful number, since it uses less digits than its factorization.

645413372675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110800822 (or 110800817 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 53.

The spelling of 645413372675 in words is "six hundred forty-five billion, four hundred thirteen million, three hundred seventy-two thousand, six hundred seventy-five".