161832416656 has 45 divisors (see below), whose sum is σ = 315997880961. Its totient is φ = 80289449856.

The previous prime is 161832416653. The next prime is 161832416671. The reversal of 161832416656 is 656614238161.

The square root of 161832416656 is 402284.

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

It can be written as a sum of positive squares in only one way, i.e., 4686771600 + 157145645056 = 68460^2 + 396416^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161832416651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 262288860 + ... + 262289476.

Almost surely, 2^161832416656 is an apocalyptic number.

161832416656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161832416656 is the 402284-th square number.

It is an amenable number.

161832416656 is a deficient number, since it is larger than the sum of its proper divisors (154165464305).

161832416656 is an frugal number, since it uses more digits than its factorization.

161832416656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 782 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

Multiplying 161832416656 by its sum of digits (49), we get a square (7929788416144 = 2815988²).

The spelling of 161832416656 in words is "one hundred sixty-one billion, eight hundred thirty-two million, four hundred sixteen thousand, six hundred fifty-six".