155261568 has 256 divisors, whose sum is σ = 528768000. Its totient is φ = 39198720.

The previous prime is 155261567. The next prime is 155261581. The reversal of 155261568 is 865162551.

It is not an unprimeable number, because it can be changed into a prime (155261567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1744468 + ... + 1744556.

It is an arithmetic number, because the mean of its divisors is an integer number (2065500).

Almost surely, 2^155261568 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 155261568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264384000).

155261568 is an abundant number, since it is smaller than the sum of its proper divisors (373506432).

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

155261568 is a wasteful number, since it uses less digits than its factorization.

155261568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 171 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 155261568 is about 12460.3999935797. The cubic root of 155261568 is about 537.4705293378.

The spelling of 155261568 in words is "one hundred fifty-five million, two hundred sixty-one thousand, five hundred sixty-eight".