161227769 has 8 divisors (see below), whose sum is σ = 172151232. Its totient is φ = 150630480.

The previous prime is 161227751. The next prime is 161227777. The reversal of 161227769 is 967722161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161227769 - 2⁸ = 161227513 is a prime.

It is a super-2 number, since 2×161227769² = 51988786993434722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161227789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80522 + ... + 82499.

It is an arithmetic number, because the mean of its divisors is an integer number (21518904).

Almost surely, 2^161227769 is an apocalyptic number.

It is an amenable number.

161227769 is a deficient number, since it is larger than the sum of its proper divisors (10923463).

161227769 is a wasteful number, since it uses less digits than its factorization.

161227769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163087.

The product of its digits is 63504, while the sum is 41.

The square root of 161227769 is about 12697.5497242578. The cubic root of 161227769 is about 544.2686022613.

The spelling of 161227769 in words is "one hundred sixty-one million, two hundred twenty-seven thousand, seven hundred sixty-nine".