640028591358 has 32 divisors (see below), whose sum is σ = 1380131809056. Its totient is φ = 196702061568.

The previous prime is 640028591353. The next prime is 640028591359. The reversal of 640028591358 is 853195820046.

It is a self number, because there is not a number n which added to its sum of digits gives 640028591358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640028591353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4720491 + ... + 4854182.

It is an arithmetic number, because the mean of its divisors is an integer number (43129119033).

Almost surely, 2^640028591358 is an apocalyptic number.

640028591358 is an abundant number, since it is smaller than the sum of its proper divisors (740103217698).

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

640028591358 is a wasteful number, since it uses less digits than its factorization.

640028591358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9575548.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 640028591358 in words is "six hundred forty billion, twenty-eight million, five hundred ninety-one thousand, three hundred fifty-eight".