645577753170 has 128 divisors (see below), whose sum is σ = 1776664834560. Its totient is φ = 147066716160.

The previous prime is 645577753111. The next prime is 645577753189. The reversal of 645577753170 is 71357775546.

645577753170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 645577753170.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84132454 + ... + 84140126.

It is an arithmetic number, because the mean of its divisors is an integer number (13880194020).

Almost surely, 2^645577753170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645577753170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888332417280).

645577753170 is an abundant number, since it is smaller than the sum of its proper divisors (1131087081390).

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

645577753170 is a wasteful number, since it uses less digits than its factorization.

645577753170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980.

The product of its (nonzero) digits is 21609000, while the sum is 57.

The spelling of 645577753170 in words is "six hundred forty-five billion, five hundred seventy-seven million, seven hundred fifty-three thousand, one hundred seventy".