155646 has 12 divisors (see below), whose sum is σ = 337272. Its totient is φ = 51876.

The previous prime is 155627. The next prime is 155653. The reversal of 155646 is 646551.

It is a happy number.

155646 is a `hidden beast` number, since 15 + 5 + 646 = 666.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155646.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4306 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (28106).

2¹⁵⁵⁶⁴⁶ is an apocalyptic number.

155646 is an abundant number, since it is smaller than the sum of its proper divisors (181626).

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

155646 is a wasteful number, since it uses less digits than its factorization.

155646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8655 (or 8652 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 155646 is about 394.5199614722. The cubic root of 155646 is about 53.7913761093.

The spelling of 155646 in words is "one hundred fifty-five thousand, six hundred forty-six".