641170959 has 24 divisors (see below), whose sum is σ = 1009878912. Its totient is φ = 358693920.

The previous prime is 641170921. The next prime is 641170969. The reversal of 641170959 is 959071146.

It is not a de Polignac number, because 641170959 - 2⁸ = 641170703 is a prime.

It is a super-2 number, since 2×641170959² = 822200397329959362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641170959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641170909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51907 + ... + 63060.

It is an arithmetic number, because the mean of its divisors is an integer number (42078288).

Almost surely, 2^641170959 is an apocalyptic number.

641170959 is a deficient number, since it is larger than the sum of its proper divisors (368707953).

641170959 is a wasteful number, since it uses less digits than its factorization.

641170959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115007 (or 114994 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 641170959 is about 25321.3538145179. The cubic root of 641170959 is about 862.2991296979.

The spelling of 641170959 in words is "six hundred forty-one million, one hundred seventy thousand, nine hundred fifty-nine".