645341715 has 32 divisors (see below), whose sum is σ = 1148331840. Its totient is φ = 343865088.

The previous prime is 645341701. The next prime is 645341771. The reversal of 645341715 is 517143546.

645341715 is a `hidden beast` number, since 645 + 3 + 4 + 1 + 7 + 1 + 5 = 666.

It is not a de Polignac number, because 645341715 - 2⁴ = 645341699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645341715.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259719 + ... + 262191.

It is an arithmetic number, because the mean of its divisors is an integer number (35885370).

Almost surely, 2^645341715 is an apocalyptic number.

645341715 is a deficient number, since it is larger than the sum of its proper divisors (502990125).

645341715 is a wasteful number, since it uses less digits than its factorization.

645341715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420 (or 4414 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 645341715 is about 25403.5768150865. The cubic root of 645341715 is about 864.1648147196.

The spelling of 645341715 in words is "six hundred forty-five million, three hundred forty-one thousand, seven hundred fifteen".