538809092165 has 4 divisors (see below), whose sum is σ = 646570910604. Its totient is φ = 431047273728.

The previous prime is 538809092161. The next prime is 538809092191. The reversal of 538809092165 is 561290908835.

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 203763765604 + 335045326561 = 451402^2 + 578831^2 .

It is a cyclic number.

It is not a de Polignac number, because 538809092165 - 2² = 538809092161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538809092165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538809092161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53880909212 + ... + 53880909221.

It is an arithmetic number, because the mean of its divisors is an integer number (161642727651).

Almost surely, 2^538809092165 is an apocalyptic number.

It is an amenable number.

538809092165 is a deficient number, since it is larger than the sum of its proper divisors (107761818439).

538809092165 is a wasteful number, since it uses less digits than its factorization.

538809092165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107761818438.

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 538809092165 in words is "five hundred thirty-eight billion, eight hundred nine million, ninety-two thousand, one hundred sixty-five".