161173419264 has 432 divisors, whose sum is σ = 569707931520. Its totient is φ = 43121295360.

The previous prime is 161173419263. The next prime is 161173419293. The reversal of 161173419264 is 462914371161.

161173419264 is a `hidden beast` number, since 1 + 6 + 1 + 173 + 419 + 2 + 64 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161173419263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7567222 + ... + 7588490.

It is an arithmetic number, because the mean of its divisors is an integer number (1318768360).

Almost surely, 2^161173419264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161173419264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284853965760).

161173419264 is an abundant number, since it is smaller than the sum of its proper divisors (408534512256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161173419264 is a wasteful number, since it uses less digits than its factorization.

161173419264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21338 (or 21321 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 161173419264 in words is "one hundred sixty-one billion, one hundred seventy-three million, four hundred nineteen thousand, two hundred sixty-four".