161179766784 has 585 divisors, whose sum is σ = 524259065671. Its totient is φ = 49332879360.

The previous prime is 161179766779. The next prime is 161179766807. The reversal of 161179766784 is 487667971161.

The square root of 161179766784 is 401472.

It is a perfect power (a square), and thus also a powerful number.

161179766784 is a `hidden beast` number, since 1 + 611 + 7 + 9 + 7 + 6 + 6 + 7 + 8 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11355033600 + 149824733184 = 106560^2 + 387072^2 .

It is a Duffinian number.

Its product of digits (21337344) is a multiple of the sum of its prime divisors (63).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3931213804 + ... + 3931213844.

Almost surely, 2^161179766784 is an apocalyptic number.

161179766784 is the 401472-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161179766784

161179766784 is an abundant number, since it is smaller than the sum of its proper divisors (363079298887).

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

161179766784 is an frugal number, since it uses more digits than its factorization.

161179766784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 63 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 161179766784 in words is "one hundred sixty-one billion, one hundred seventy-nine million, seven hundred sixty-six thousand, seven hundred eighty-four".