640154520304 has 40 divisors (see below), whose sum is σ = 1352614746560. Its totient is φ = 291715976448.

The previous prime is 640154520263. The next prime is 640154520307. The reversal of 640154520304 is 403025451046.

It is a self number, because there is not a number n which added to its sum of digits gives 640154520304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640154520307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19462467 + ... + 19495330.

It is an arithmetic number, because the mean of its divisors is an integer number (33815368664).

Almost surely, 2^640154520304 is an apocalyptic number.

It is an amenable number.

640154520304 is an abundant number, since it is smaller than the sum of its proper divisors (712460226256).

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

640154520304 is a wasteful number, since it uses less digits than its factorization.

640154520304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38957897 (or 38957891 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 640154520304 in words is "six hundred forty billion, one hundred fifty-four million, five hundred twenty thousand, three hundred four".