640375601 has 8 divisors (see below), whose sum is σ = 713731680. Its totient is φ = 570984768.

The previous prime is 640375577. The next prime is 640375643. The reversal of 640375601 is 106573046.

640375601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 640375601 - 2¹⁴ = 640359217 is a prime.

It is a super-2 number, since 2×640375601² = 820161820712222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640375691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990971 + ... + 991616.

It is an arithmetic number, because the mean of its divisors is an integer number (89216460).

Almost surely, 2^640375601 is an apocalyptic number.

It is an amenable number.

640375601 is a deficient number, since it is larger than the sum of its proper divisors (73356079).

640375601 is a wasteful number, since it uses less digits than its factorization.

640375601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982623.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 640375601 is about 25305.6436590734. The cubic root of 640375601 is about 861.9424280073.

The spelling of 640375601 in words is "six hundred forty million, three hundred seventy-five thousand, six hundred one".