640225825674 has 8 divisors (see below), whose sum is σ = 1280451651360. Its totient is φ = 213408608556.

The previous prime is 640225825669. The next prime is 640225825697. The reversal of 640225825674 is 476528522046.

It is a sphenic number, since it is the product of 3 distinct primes.

640225825674 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53352152134 + ... + 53352152145.

It is an arithmetic number, because the mean of its divisors is an integer number (160056456420).

Almost surely, 2^640225825674 is an apocalyptic number.

640225825674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

640225825674 is a wasteful number, since it uses less digits than its factorization.

640225825674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106704304284.

The product of its (nonzero) digits is 6451200, while the sum is 51.

The spelling of 640225825674 in words is "six hundred forty billion, two hundred twenty-five million, eight hundred twenty-five thousand, six hundred seventy-four".