640375599 has 8 divisors (see below), whose sum is σ = 854284032. Its totient is φ = 426692120.

The previous prime is 640375577. The next prime is 640375643. The reversal of 640375599 is 995573046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640375599 - 2¹² = 640371503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640375699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49479 + ... + 61064.

It is an arithmetic number, because the mean of its divisors is an integer number (106785504).

Almost surely, 2^640375599 is an apocalyptic number.

640375599 is a deficient number, since it is larger than the sum of its proper divisors (213908433).

640375599 is a wasteful number, since it uses less digits than its factorization.

640375599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112477.

The product of its (nonzero) digits is 1020600, while the sum is 48.

The square root of 640375599 is about 25305.6436195565. The cubic root of 640375599 is about 861.9424271100.

The spelling of 640375599 in words is "six hundred forty million, three hundred seventy-five thousand, five hundred ninety-nine".