155955555 has 48 divisors (see below), whose sum is σ = 317313984. Its totient is φ = 69361920.

The previous prime is 155955529. The next prime is 155955557. The reversal of 155955555 is 555559551.

155955555 is a `hidden beast` number, since 1 + 5 + 5 + 95 + 5 + 555 = 666.

155955555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155955555 - 2⁵ = 155955523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 155955555.

It is not an unprimeable number, because it can be changed into a prime (155955557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4965 + ... + 18345.

It is an arithmetic number, because the mean of its divisors is an integer number (6610708).

Almost surely, 2^155955555 is an apocalyptic number.

155955555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155955555 is an abundant number, since it is smaller than the sum of its proper divisors (161358429).

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

155955555 is a wasteful number, since it uses less digits than its factorization.

155955555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436 (or 13433 counting only the distinct ones).

The product of its digits is 703125, while the sum is 45.

The square root of 155955555 is about 12488.2166461028. The cubic root of 155955555 is about 538.2701330870.

The spelling of 155955555 in words is "one hundred fifty-five million, nine hundred fifty-five thousand, five hundred fifty-five".