155289568 has 24 divisors (see below), whose sum is σ = 349402032. Its totient is φ = 66552576.

The previous prime is 155289559. The next prime is 155289569. The reversal of 155289568 is 865982551.

It is a super-2 number, since 2×155289568² = 48229699859253248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155289569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346405 + ... + 346852.

It is an arithmetic number, because the mean of its divisors is an integer number (14558418).

Almost surely, 2^155289568 is an apocalyptic number.

It is an amenable number.

155289568 is an abundant number, since it is smaller than the sum of its proper divisors (194112464).

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

155289568 is an equidigital number, since it uses as much as digits as its factorization.

155289568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693274 (or 693266 counting only the distinct ones).

The product of its digits is 864000, while the sum is 49.

The square root of 155289568 is about 12461.5235023652. The cubic root of 155289568 is about 537.5028366896.

The spelling of 155289568 in words is "one hundred fifty-five million, two hundred eighty-nine thousand, five hundred sixty-eight".