161055099 has 6 divisors (see below), whose sum is σ = 232635156. Its totient is φ = 107370060.

The previous prime is 161055091. The next prime is 161055101. The reversal of 161055099 is 990550161.

161055099 is a `hidden beast` number, since 1 + 6 + 10 + 550 + 99 = 666.

161055099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161055099 - 2³ = 161055091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161055091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8947497 + ... + 8947514.

It is an arithmetic number, because the mean of its divisors is an integer number (38772526).

Almost surely, 2^161055099 is an apocalyptic number.

161055099 is a deficient number, since it is larger than the sum of its proper divisors (71580057).

161055099 is a wasteful number, since it uses less digits than its factorization.

161055099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17895017 (or 17895014 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 161055099 is about 12690.7485594822. The cubic root of 161055099 is about 544.0742345260.

The spelling of 161055099 in words is "one hundred sixty-one million, fifty-five thousand, ninety-nine".