161979266592 has 1152 divisors, whose sum is σ = 599645749248. Its totient is φ = 42326323200.

The previous prime is 161979266557. The next prime is 161979266597. The reversal of 161979266592 is 295662979161.

161979266592 is a `hidden beast` number, since 1 + 6 + 19 + 7 + 9 + 26 + 6 + 592 = 666.

Its product of digits (22044960) is a multiple of the sum of its prime divisors (224).

It is not an unprimeable number, because it can be changed into a prime (161979266597) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1275427233 + ... + 1275427359.

It is an arithmetic number, because the mean of its divisors is an integer number (520525824).

Almost surely, 2^161979266592 is an apocalyptic number.

161979266592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161979266592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299822874624).

161979266592 is an abundant number, since it is smaller than the sum of its proper divisors (437666482656).

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

161979266592 is a wasteful number, since it uses less digits than its factorization.

161979266592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 224 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The spelling of 161979266592 in words is "one hundred sixty-one billion, nine hundred seventy-nine million, two hundred sixty-six thousand, five hundred ninety-two".