640180024 has 24 divisors (see below), whose sum is σ = 1319381280. Its totient is φ = 290990480.

The previous prime is 640180019. The next prime is 640180049. The reversal of 640180024 is 420081046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329704 + ... + 331639.

It is an arithmetic number, because the mean of its divisors is an integer number (54974220).

Almost surely, 2^640180024 is an apocalyptic number.

It is an amenable number.

640180024 is an abundant number, since it is smaller than the sum of its proper divisors (679201256).

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

640180024 is a wasteful number, since it uses less digits than its factorization.

640180024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661371 (or 661356 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 640180024 is about 25301.7790678837. The cubic root of 640180024 is about 861.8546705108.

The spelling of 640180024 in words is "six hundred forty million, one hundred eighty thousand, twenty-four".