640413575 has 24 divisors (see below), whose sum is σ = 831027168. Its totient is φ = 489041280.

The previous prime is 640413559. The next prime is 640413589. The reversal of 640413575 is 575314046.

It is not a de Polignac number, because 640413575 - 2⁴ = 640413559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42494 + ... + 55556.

It is an arithmetic number, because the mean of its divisors is an integer number (34626132).

Almost surely, 2^640413575 is an apocalyptic number.

640413575 is a deficient number, since it is larger than the sum of its proper divisors (190613593).

640413575 is a wasteful number, since it uses less digits than its factorization.

640413575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13163 (or 13158 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 640413575 is about 25306.3939548882. The cubic root of 640413575 is about 861.9594652767.

The spelling of 640413575 in words is "six hundred forty million, four hundred thirteen thousand, five hundred seventy-five".