640579295 has 16 divisors (see below), whose sum is σ = 826067808. Its totient is φ = 475115520.

The previous prime is 640579283. The next prime is 640579327. The reversal of 640579295 is 592975046.

It is not a de Polignac number, because 640579295 - 2¹⁴ = 640562911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50546 + ... + 61935.

It is an arithmetic number, because the mean of its divisors is an integer number (51629238).

Almost surely, 2^640579295 is an apocalyptic number.

640579295 is a deficient number, since it is larger than the sum of its proper divisors (185488513).

640579295 is a wasteful number, since it uses less digits than its factorization.

640579295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112570.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 640579295 is about 25309.6680144169. The cubic root of 640579295 is about 862.0338086951.

The spelling of 640579295 in words is "six hundred forty million, five hundred seventy-nine thousand, two hundred ninety-five".