641776874 has 16 divisors (see below), whose sum is σ = 967020000. Its totient is φ = 319441104.

The previous prime is 641776867. The next prime is 641776921. The reversal of 641776874 is 478677146.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707129 + ... + 708035.

It is an arithmetic number, because the mean of its divisors is an integer number (60438750).

Almost surely, 2^641776874 is an apocalyptic number.

641776874 is a deficient number, since it is larger than the sum of its proper divisors (325243126).

641776874 is a wasteful number, since it uses less digits than its factorization.

641776874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117.

The product of its digits is 1580544, while the sum is 50.

The square root of 641776874 is about 25333.3154956078. The cubic root of 641776874 is about 862.5706721899.

The spelling of 641776874 in words is "six hundred forty-one million, seven hundred seventy-six thousand, eight hundred seventy-four".