640523828873000 has 128 divisors (see below), whose sum is σ = 1577962568332800. Its totient is φ = 242686166688000.

The previous prime is 640523828872903. The next prime is 640523828873011. The reversal of 640523828873000 is 378828325046.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116771930 + ... + 122134070.

It is an arithmetic number, because the mean of its divisors is an integer number (12327832565100).

Almost surely, 2^{640523828873000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640523828873000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788981284166400).

640523828873000 is an abundant number, since it is smaller than the sum of its proper divisors (937438739459800).

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

640523828873000 is a wasteful number, since it uses less digits than its factorization.

640523828873000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368468 (or 5368454 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 640523828873000 in words is "six hundred forty trillion, five hundred twenty-three billion, eight hundred twenty-eight million, eight hundred seventy-three thousand".