155165568 has 128 divisors (see below), whose sum is σ = 432251520. Its totient is φ = 49268736.

The previous prime is 155165557. The next prime is 155165581. The reversal of 155165568 is 865561551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951855 + ... + 952017.

It is an arithmetic number, because the mean of its divisors is an integer number (3376965).

Almost surely, 2^155165568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155165568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216125760).

155165568 is an abundant number, since it is smaller than the sum of its proper divisors (277085952).

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

155165568 is a wasteful number, since it uses less digits than its factorization.

155165568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 272 counting only the distinct ones).

The product of its digits is 180000, while the sum is 42.

The square root of 155165568 is about 12456.5471941465. The cubic root of 155165568 is about 537.3597317775.

The spelling of 155165568 in words is "one hundred fifty-five million, one hundred sixty-five thousand, five hundred sixty-eight".