155655280 has 80 divisors (see below), whose sum is σ = 399974400. Its totient is φ = 55860480.

The previous prime is 155655233. The next prime is 155655289. The reversal of 155655280 is 82556551.

155655280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155655289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68401 + ... + 70639.

It is an arithmetic number, because the mean of its divisors is an integer number (4999680).

Almost surely, 2^155655280 is an apocalyptic number.

155655280 is a gapful number since it is divisible by the number (10) 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 155655280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199987200).

155655280 is an abundant number, since it is smaller than the sum of its proper divisors (244319120).

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

155655280 is a wasteful number, since it uses less digits than its factorization.

155655280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The square root of 155655280 is about 12476.1885205378. The cubic root of 155655280 is about 537.9244514637.

The spelling of 155655280 in words is "one hundred fifty-five million, six hundred fifty-five thousand, two hundred eighty".