641033444 has 6 divisors (see below), whose sum is σ = 1121808534. Its totient is φ = 320516720.

The previous prime is 641033441. The next prime is 641033453. The reversal of 641033444 is 444330146.

It can be written as a sum of positive squares in only one way, i.e., 480048100 + 160985344 = 21910^2 + 12688^2 .

It is a super-2 number, since 2×641033444² = 821847752653002272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641033441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80129177 + ... + 80129184.

It is an arithmetic number, because the mean of its divisors is an integer number (186968089).

Almost surely, 2^641033444 is an apocalyptic number.

It is an amenable number.

641033444 is a deficient number, since it is larger than the sum of its proper divisors (480775090).

641033444 is a wasteful number, since it uses less digits than its factorization.

641033444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160258365 (or 160258363 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 641033444 is about 25318.6382730193. The cubic root of 641033444 is about 862.2374781515.

The spelling of 641033444 in words is "six hundred forty-one million, thirty-three thousand, four hundred forty-four".