155855616 has 144 divisors (see below), whose sum is σ = 483888384. Its totient is φ = 43610112.

The previous prime is 155855551. The next prime is 155855629. The reversal of 155855616 is 616558551.

155855616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284655 + ... + 285201.

It is an arithmetic number, because the mean of its divisors is an integer number (3360336).

Almost surely, 2^155855616 is an apocalyptic number.

155855616 is a gapful number since it is divisible by the number (16) 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 155855616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241944192).

155855616 is an abundant number, since it is smaller than the sum of its proper divisors (328032768).

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

155855616 is an equidigital number, since it uses as much as digits as its factorization.

155855616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 612 counting only the distinct ones).

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

The square root of 155855616 is about 12484.2146729380. The cubic root of 155855616 is about 538.1551309342.

The spelling of 155855616 in words is "one hundred fifty-five million, eight hundred fifty-five thousand, six hundred sixteen".