640365301 has 4 divisors (see below), whose sum is σ = 640553472. Its totient is φ = 640177132.

The previous prime is 640365293. The next prime is 640365311. The reversal of 640365301 is 103563046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 640365301 - 2³ = 640365293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640365301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640365311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88885 + ... + 95818.

It is an arithmetic number, because the mean of its divisors is an integer number (160138368).

Almost surely, 2^640365301 is an apocalyptic number.

It is an amenable number.

640365301 is a deficient number, since it is larger than the sum of its proper divisors (188171).

640365301 is a wasteful number, since it uses less digits than its factorization.

640365301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188170.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 640365301 is about 25305.4401463401. The cubic root of 640365301 is about 861.9378067327.

The spelling of 640365301 in words is "six hundred forty million, three hundred sixty-five thousand, three hundred one".