161160840 has 80 divisors (see below), whose sum is σ = 541690380. Its totient is φ = 42975360.

The previous prime is 161160829. The next prime is 161160887. The reversal of 161160840 is 48061161.

161160840 is a `hidden beast` number, since 1 + 6 + 11 + 608 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 155600676 + 5560164 = 12474^2 + 2358^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 21631 + ... + 28110.

Almost surely, 2^161160840 is an apocalyptic number.

161160840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161160840 is an abundant number, since it is smaller than the sum of its proper divisors (380529540).

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

161160840 is a wasteful number, since it uses less digits than its factorization.

161160840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49764 (or 49751 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 161160840 is about 12694.9139422054. The cubic root of 161160840 is about 544.1932794323.

The spelling of 161160840 in words is "one hundred sixty-one million, one hundred sixty thousand, eight hundred forty".