641861374 has 16 divisors (see below), whose sum is σ = 1200364416. Its totient is φ = 250075800.

The previous prime is 641861369. The next prime is 641861377. The reversal of 641861374 is 473168146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641861377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2083812 + ... + 2084119.

It is an arithmetic number, because the mean of its divisors is an integer number (75022776).

Almost surely, 2^641861374 is an apocalyptic number.

641861374 is a deficient number, since it is larger than the sum of its proper divisors (558503042).

641861374 is a wasteful number, since it uses less digits than its factorization.

641861374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167951.

The product of its digits is 96768, while the sum is 40.

The square root of 641861374 is about 25334.9832050467. The cubic root of 641861374 is about 862.6085275183.

The spelling of 641861374 in words is "six hundred forty-one million, eight hundred sixty-one thousand, three hundred seventy-four".