41779138165 has 4 divisors (see below), whose sum is σ = 50134965804. Its totient is φ = 33423310528.

The previous prime is 41779138139. The next prime is 41779138169. The reversal of 41779138165 is 56183197714.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19141829316 + 22637308849 = 138354^2 + 150457^2 .

It is a cyclic number.

It is not a de Polignac number, because 41779138165 - 2²⁷ = 41644920437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41779138169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4177913812 + ... + 4177913821.

It is an arithmetic number, because the mean of its divisors is an integer number (12533741451).

Almost surely, 2^41779138165 is an apocalyptic number.

It is an amenable number.

41779138165 is a deficient number, since it is larger than the sum of its proper divisors (8355827639).

41779138165 is an equidigital number, since it uses as much as digits as its factorization.

41779138165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355827638.

The product of its digits is 1270080, while the sum is 52.

The spelling of 41779138165 in words is "forty-one billion, seven hundred seventy-nine million, one hundred thirty-eight thousand, one hundred sixty-five".