641394259 has 16 divisors (see below), whose sum is σ = 712118880. Its totient is φ = 577605600.

The previous prime is 641394227. The next prime is 641394269. The reversal of 641394259 is 952493146.

It is not a de Polignac number, because 641394259 - 2⁵ = 641394227 is a prime.

It is a super-2 number, since 2×641394259² = 822773190956318162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641394269) 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, 142869 + ... + 147289.

It is an arithmetic number, because the mean of its divisors is an integer number (44507430).

Almost surely, 2^641394259 is an apocalyptic number.

641394259 is a deficient number, since it is larger than the sum of its proper divisors (70724621).

641394259 is a wasteful number, since it uses less digits than its factorization.

641394259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563 (or 4541 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 641394259 is about 25325.7627525806. The cubic root of 641394259 is about 862.3992221116.

The spelling of 641394259 in words is "six hundred forty-one million, three hundred ninety-four thousand, two hundred fifty-nine".