161113761 has 12 divisors (see below), whose sum is σ = 236194192. Its totient is φ = 105805656.

The previous prime is 161113739. The next prime is 161113817. The reversal of 161113761 is 167311161.

It is not a de Polignac number, because 161113761 - 2¹⁰ = 161112737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161113721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132991 + ... + 134196.

Almost surely, 2^161113761 is an apocalyptic number.

It is an amenable number.

161113761 is a deficient number, since it is larger than the sum of its proper divisors (75080431).

161113761 is a wasteful number, since it uses less digits than its factorization.

161113761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267260 (or 267257 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 161113761 is about 12693.0595602479. The cubic root of 161113761 is about 544.1402835752.

The spelling of 161113761 in words is "one hundred sixty-one million, one hundred thirteen thousand, seven hundred sixty-one".