640291160 has 16 divisors (see below), whose sum is σ = 1440655200. Its totient is φ = 256116448.

The previous prime is 640291159. The next prime is 640291163. The reversal of 640291160 is 61192046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640291163) 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 3 ways as a sum of consecutive naturals, for example, 8003600 + ... + 8003679.

It is an arithmetic number, because the mean of its divisors is an integer number (90040950).

Almost surely, 2^640291160 is an apocalyptic number.

It is an amenable number.

640291160 is an abundant number, since it is smaller than the sum of its proper divisors (800364040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640291160 is a wasteful number, since it uses less digits than its factorization.

640291160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16007290 (or 16007286 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 640291160 is about 25303.9751817773. The cubic root of 640291160 is about 861.9045406176.

The spelling of 640291160 in words is "six hundred forty million, two hundred ninety-one thousand, one hundred sixty".