641672269 has 8 divisors (see below), whose sum is σ = 734365440. Its totient is φ = 549235536.

The previous prime is 641672261. The next prime is 641672279. The reversal of 641672269 is 962276146.

It is a happy number.

641672269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641672269 - 2³ = 641672261 is a prime.

It is a super-2 number, since 2×641672269² = 823486601607216722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641672261) 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, 58714 + ... + 68779.

It is an arithmetic number, because the mean of its divisors is an integer number (91795680).

Almost surely, 2^641672269 is an apocalyptic number.

It is an amenable number.

641672269 is a deficient number, since it is larger than the sum of its proper divisors (92693171).

641672269 is a wasteful number, since it uses less digits than its factorization.

641672269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128219.

The product of its digits is 217728, while the sum is 43.

The square root of 641672269 is about 25331.2508376511. The cubic root of 641672269 is about 862.5238053781.

The spelling of 641672269 in words is "six hundred forty-one million, six hundred seventy-two thousand, two hundred sixty-nine".