161350035856 has 45 divisors (see below), whose sum is σ = 315344426691. Its totient is φ = 79976891136.

The previous prime is 161350035851. The next prime is 161350035857. The reversal of 161350035856 is 658530053161.

The square root of 161350035856 is 401684.

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

It can be written as a sum of positive squares in 4 ways, for example, as 71013722256 + 90336313600 = 266484^2 + 300560^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161350035851) 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, 220122466 + ... + 220123198.

Almost surely, 2^161350035856 is an apocalyptic number.

161350035856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161350035856 is the 401684-th square number.

It is an amenable number.

161350035856 is a deficient number, since it is larger than the sum of its proper divisors (153994390835).

161350035856 is an frugal number, since it uses more digits than its factorization.

161350035856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 161350035856 in words is "one hundred sixty-one billion, three hundred fifty million, thirty-five thousand, eight hundred fifty-six".