641044061 has 16 divisors (see below), whose sum is σ = 754887168. Its totient is φ = 532924800.

The previous prime is 641044049. The next prime is 641044067. The reversal of 641044061 is 160440146.

It is a cyclic number.

It is not a de Polignac number, because 641044061 - 2¹⁴ = 641027677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641044061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641044067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43196 + ... + 56106.

It is an arithmetic number, because the mean of its divisors is an integer number (47180448).

Almost surely, 2^641044061 is an apocalyptic number.

It is an amenable number.

641044061 is a deficient number, since it is larger than the sum of its proper divisors (113843107).

641044061 is a wasteful number, since it uses less digits than its factorization.

641044061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13132.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 641044061 is about 25318.8479398254. The cubic root of 641044061 is about 862.2422383425.

The spelling of 641044061 in words is "six hundred forty-one million, forty-four thousand, sixty-one".