161105656 has 16 divisors (see below), whose sum is σ = 305713800. Its totient is φ = 79581984.

The previous prime is 161105641. The next prime is 161105657. The reversal of 161105656 is 656501161.

161105656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161105657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120651 + ... + 121978.

Almost surely, 2^161105656 is an apocalyptic number.

It is an amenable number.

161105656 is a deficient number, since it is larger than the sum of its proper divisors (144608144).

161105656 is a wasteful number, since it uses less digits than its factorization.

161105656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242718 (or 242714 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 161105656 is about 12692.7402872666. The cubic root of 161105656 is about 544.1311589026.

The spelling of 161105656 in words is "one hundred sixty-one million, one hundred five thousand, six hundred fifty-six".