640118324 has 6 divisors (see below), whose sum is σ = 1120207074. Its totient is φ = 320059160.

The previous prime is 640118309. The next prime is 640118351. The reversal of 640118324 is 423811046.

640118324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 402403600 + 237714724 = 20060^2 + 15418^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80014787 + ... + 80014794.

It is an arithmetic number, because the mean of its divisors is an integer number (186701179).

Almost surely, 2^640118324 is an apocalyptic number.

It is an amenable number.

640118324 is a deficient number, since it is larger than the sum of its proper divisors (480088750).

640118324 is a wasteful number, since it uses less digits than its factorization.

640118324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160029585 (or 160029583 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 640118324 is about 25300.5597566536. The cubic root of 640118324 is about 861.8269813506.

The spelling of 640118324 in words is "six hundred forty million, one hundred eighteen thousand, three hundred twenty-four".