161606055 has 32 divisors (see below), whose sum is σ = 279982080. Its totient is φ = 79125120.

The previous prime is 161606023. The next prime is 161606057. The reversal of 161606055 is 550606161.

It is not a de Polignac number, because 161606055 - 2⁵ = 161606023 is a prime.

It is a super-2 number, since 2×161606055² = 52233034025326050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35076 + ... + 39414.

It is an arithmetic number, because the mean of its divisors is an integer number (8749440).

Almost surely, 2^161606055 is an apocalyptic number.

161606055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161606055 is a deficient number, since it is larger than the sum of its proper divisors (118376025).

161606055 is a wasteful number, since it uses less digits than its factorization.

161606055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4551.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 161606055 is about 12712.4370204930. The cubic root of 161606055 is about 544.6939392004.

The spelling of 161606055 in words is "one hundred sixty-one million, six hundred six thousand, fifty-five".