161896788496 has 15 divisors (see below), whose sum is σ = 313678146063. Its totient is φ = 80947589520.

The previous prime is 161896788479. The next prime is 161896788497. The reversal of 161896788496 is 694887698161.

The square root of 161896788496 is 402364.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161896788497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1559161 + ... + 1659751.

Almost surely, 2^161896788496 is an apocalyptic number.

161896788496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161896788496 is the 402364-th square number.

It is an amenable number.

161896788496 is a deficient number, since it is larger than the sum of its proper divisors (151781357567).

161896788496 is an frugal number, since it uses more digits than its factorization.

161896788496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201190 (or 100593 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 73.

The spelling of 161896788496 in words is "one hundred sixty-one billion, eight hundred ninety-six million, seven hundred eighty-eight thousand, four hundred ninety-six".