180834692161 has 4 divisors (see below), whose sum is σ = 191472027012. Its totient is φ = 170197357312.

The previous prime is 180834692147. The next prime is 180834692231. The reversal of 180834692161 is 161296438081.

It is a happy number.

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 103928864400 + 76905827761 = 322380^2 + 277319^2 .

It is a cyclic number.

It is not a de Polignac number, because 180834692161 - 2²⁵ = 180801137729 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180834692261) 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, 5318667400 + ... + 5318667433.

It is an arithmetic number, because the mean of its divisors is an integer number (47868006753).

Almost surely, 2^180834692161 is an apocalyptic number.

It is an amenable number.

180834692161 is a deficient number, since it is larger than the sum of its proper divisors (10637334851).

180834692161 is a wasteful number, since it uses less digits than its factorization.

180834692161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10637334850.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 180834692161 in words is "one hundred eighty billion, eight hundred thirty-four million, six hundred ninety-two thousand, one hundred sixty-one".