161161160 has 32 divisors (see below), whose sum is σ = 371460600. Its totient is φ = 62891520.

The previous prime is 161161129. The next prime is 161161171. The reversal of 161161160 is 61161161.

It can be written as a sum of positive squares in 4 ways, for example, as 33154564 + 128006596 = 5758^2 + 11314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47495 + ... + 50774.

Almost surely, 2^161161160 is an apocalyptic number.

161161160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161161160 is an abundant number, since it is smaller than the sum of its proper divisors (210299440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161161160 is a wasteful number, since it uses less digits than its factorization.

161161160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98321 (or 98317 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 161161160 is about 12694.9265456717. The cubic root of 161161160 is about 544.1936396144.

Subtracting from 161161160 its reverse (61161161), we obtain a palindrome (99999999).

The spelling of 161161160 in words is "one hundred sixty-one million, one hundred sixty-one thousand, one hundred sixty".