161011656 has 48 divisors (see below), whose sum is σ = 469620060. Its totient is φ = 49541760.

The previous prime is 161011603. The next prime is 161011657. The reversal of 161011656 is 656110161.

161011656 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 1 + 1 + 656 = 666.

161011656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 158004900 + 3006756 = 12570^2 + 1734^2 .

It is not an unprimeable number, because it can be changed into a prime (161011657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85075 + ... + 86946.

Almost surely, 2^161011656 is an apocalyptic number.

It is an amenable number.

161011656 is an abundant number, since it is smaller than the sum of its proper divisors (308608404).

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

161011656 is a wasteful number, since it uses less digits than its factorization.

161011656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172046 (or 172039 counting only the distinct ones).

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

The square root of 161011656 is about 12689.0368428813. The cubic root of 161011656 is about 544.0253106015.

The spelling of 161011656 in words is "one hundred sixty-one million, eleven thousand, six hundred fifty-six".