155961288 has 192 divisors, whose sum is σ = 510706560. Its totient is φ = 43670016.

The previous prime is 155961269. The next prime is 155961293. The reversal of 155961288 is 882169551.

It is a happy number.

155961288 is a `hidden beast` number, since 1 + 559 + 6 + 12 + 88 = 666.

155961288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 993306 + ... + 993462.

It is an arithmetic number, because the mean of its divisors is an integer number (2659930).

Almost surely, 2^155961288 is an apocalyptic number.

155961288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155961288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255353280).

155961288 is an abundant number, since it is smaller than the sum of its proper divisors (354745272).

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

155961288 is a wasteful number, since it uses less digits than its factorization.

155961288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 242 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The square root of 155961288 is about 12488.4461803701. The cubic root of 155961288 is about 538.2767286944.

The spelling of 155961288 in words is "one hundred fifty-five million, nine hundred sixty-one thousand, two hundred eighty-eight".