640052353 has 8 divisors (see below), whose sum is σ = 656038656. Its totient is φ = 624084000.

The previous prime is 640052333. The next prime is 640052429. The reversal of 640052353 is 353250046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640052353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640052333) 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, 94428 + ... + 100978.

It is an arithmetic number, because the mean of its divisors is an integer number (82004832).

Almost surely, 2^640052353 is an apocalyptic number.

It is an amenable number.

640052353 is a deficient number, since it is larger than the sum of its proper divisors (15986303).

640052353 is a wasteful number, since it uses less digits than its factorization.

640052353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 640052353 is about 25299.2559772022. The cubic root of 640052353 is about 861.7973735219.

The spelling of 640052353 in words is "six hundred forty million, fifty-two thousand, three hundred fifty-three".