161105049 has 24 divisors (see below), whose sum is σ = 271614720. Its totient is φ = 90099648.

The previous prime is 161105033. The next prime is 161105053. The reversal of 161105049 is 940501161.

161105049 is a `hidden beast` number, since 1 + 611 + 0 + 5 + 0 + 49 = 666.

It is not a de Polignac number, because 161105049 - 2⁴ = 161105033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161105029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24244 + ... + 30165.

It is an arithmetic number, because the mean of its divisors is an integer number (11317280).

Almost surely, 2^161105049 is an apocalyptic number.

It is an amenable number.

161105049 is a deficient number, since it is larger than the sum of its proper divisors (110509671).

161105049 is a wasteful number, since it uses less digits than its factorization.

161105049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54469 (or 54466 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161105049 is about 12692.7163759378. The cubic root of 161105049 is about 544.1304755249.

The spelling of 161105049 in words is "one hundred sixty-one million, one hundred five thousand, forty-nine".