640001160 has 48 divisors (see below), whose sum is σ = 2080004940. Its totient is φ = 170666880.

The previous prime is 640001137. The next prime is 640001177. The reversal of 640001160 is 61100046.

It can be written as a sum of positive squares in 2 ways, for example, as 637158564 + 2842596 = 25242^2 + 1686^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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, 888531 + ... + 889250.

Almost surely, 2^640001160 is an apocalyptic number.

640001160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640001160 is an abundant number, since it is smaller than the sum of its proper divisors (1440003780).

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

640001160 is a wasteful number, since it uses less digits than its factorization.

640001160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777798 (or 1777791 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 640001160 is about 25298.2442078497. The cubic root of 640001160 is about 861.7743966675.

The spelling of 640001160 in words is "six hundred forty million, one thousand, one hundred sixty".