640160357 has 12 divisors (see below), whose sum is σ = 676772460. Its totient is φ = 605402688.

The previous prime is 640160333. The next prime is 640160359. The reversal of 640160357 is 753061046.

It can be written as a sum of positive squares in 2 ways, for example, as 87628321 + 552532036 = 9361^2 + 23506^2 .

It is not a de Polignac number, because 640160357 - 2¹⁶ = 640094821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640160359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40283 + ... + 53879.

It is an arithmetic number, because the mean of its divisors is an integer number (56397705).

Almost surely, 2^640160357 is an apocalyptic number.

It is an amenable number.

640160357 is a deficient number, since it is larger than the sum of its proper divisors (36612103).

640160357 is a wasteful number, since it uses less digits than its factorization.

640160357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13732 (or 13709 counting only the distinct ones).

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

The square root of 640160357 is about 25301.3904163388. The cubic root of 640160357 is about 861.8458447281.

The spelling of 640160357 in words is "six hundred forty million, one hundred sixty thousand, three hundred fifty-seven".