161317406804 has 12 divisors (see below), whose sum is σ = 282481803828. Its totient is φ = 80608320000.

The previous prime is 161317406773. The next prime is 161317406807. The reversal of 161317406804 is 408604713161.

It can be written as a sum of positive squares in 2 ways, for example, as 138422690704 + 22894716100 = 372052^2 + 151310^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161317406807) 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, 12588647 + ... + 12601454.

It is an arithmetic number, because the mean of its divisors is an integer number (23540150319).

Almost surely, 2^161317406804 is an apocalyptic number.

It is an amenable number.

161317406804 is a deficient number, since it is larger than the sum of its proper divisors (121164397024).

161317406804 is a wasteful number, since it uses less digits than its factorization.

161317406804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25191706 (or 25191704 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 161317406804 in words is "one hundred sixty-one billion, three hundred seventeen million, four hundred six thousand, eight hundred four".