155560000 has 70 divisors (see below), whose sum is σ = 385837430. Its totient is φ = 62208000.

The previous prime is 155559991. The next prime is 155560001. The reversal of 155560000 is 65551.

It can be written as a sum of positive squares in 5 ways, for example, as 43877376 + 111682624 = 6624^2 + 10568^2 .

It is not an unprimeable number, because it can be changed into a prime (155560001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38056 + ... + 41944.

Almost surely, 2^155560000 is an apocalyptic number.

155560000 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 155560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192918715).

155560000 is an abundant number, since it is smaller than the sum of its proper divisors (230277430).

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

155560000 is an frugal number, since it uses more digits than its factorization.

155560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921 (or 3896 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 155560000 is about 12472.3694621351. The cubic root of 155560000 is about 537.8146706218.

The spelling of 155560000 in words is "one hundred fifty-five million, five hundred sixty thousand".