165561102 has 36 divisors (see below), whose sum is σ = 417283776. Its totient is φ = 47302920.

The previous prime is 165561091. The next prime is 165561103. The reversal of 165561102 is 201165561.

It is a happy number.

165561102 is a `hidden beast` number, since 1 + 6 + 556 + 1 + 102 = 666.

165561102 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 (165561103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 92974 + ... + 94737.

It is an arithmetic number, because the mean of its divisors is an integer number (11591216).

Almost surely, 2^165561102 is an apocalyptic number.

165561102 is an abundant number, since it is smaller than the sum of its proper divisors (251722674).

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

165561102 is a wasteful number, since it uses less digits than its factorization.

165561102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187733 (or 187723 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 165561102 is about 12867.0549077868. The cubic root of 165561102 is about 549.1016762521.

The spelling of 165561102 in words is "one hundred sixty-five million, five hundred sixty-one thousand, one hundred two".