641444334 has 16 divisors (see below), whose sum is σ = 1295591760. Its totient is φ = 211697600.

The previous prime is 641444311. The next prime is 641444339. The reversal of 641444334 is 433444146.

It is a super-2 number, since 2×641444334² = 822901667241407112, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 641444295 and 641444304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641444339) 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, 528639 + ... + 529850.

It is an arithmetic number, because the mean of its divisors is an integer number (80974485).

Almost surely, 2^641444334 is an apocalyptic number.

641444334 is an abundant number, since it is smaller than the sum of its proper divisors (654147426).

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

641444334 is a wasteful number, since it uses less digits than its factorization.

641444334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058595.

The product of its digits is 55296, while the sum is 33.

The square root of 641444334 is about 25326.7513510912. The cubic root of 641444334 is about 862.4216646351.

The spelling of 641444334 in words is "six hundred forty-one million, four hundred forty-four thousand, three hundred thirty-four".