165601055 has 16 divisors (see below), whose sum is σ = 209510400. Its totient is φ = 125310240.

The previous prime is 165601027. The next prime is 165601061. The reversal of 165601055 is 550106561.

It is not a de Polignac number, because 165601055 - 2¹⁸ = 165338911 is a prime.

It is a super-2 number, since 2×165601055² = 54847418834226050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93266 + ... + 95024.

It is an arithmetic number, because the mean of its divisors is an integer number (13094400).

Almost surely, 2^165601055 is an apocalyptic number.

165601055 is a deficient number, since it is larger than the sum of its proper divisors (43909345).

165601055 is a wasteful number, since it uses less digits than its factorization.

165601055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 165601055 is about 12868.6073450082. The cubic root of 165601055 is about 549.1458422116.

The spelling of 165601055 in words is "one hundred sixty-five million, six hundred one thousand, fifty-five".