155555385 has 16 divisors (see below), whose sum is σ = 249056640. Its totient is φ = 82906880.

The previous prime is 155555377. The next prime is 155555399. The reversal of 155555385 is 583555551.

It is not a de Polignac number, because 155555385 - 2³ = 155555377 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29500 + ... + 34370.

It is an arithmetic number, because the mean of its divisors is an integer number (15566040).

Almost surely, 2^155555385 is an apocalyptic number.

155555385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155555385 is a deficient number, since it is larger than the sum of its proper divisors (93501255).

155555385 is a wasteful number, since it uses less digits than its factorization.

155555385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7008.

The product of its digits is 375000, while the sum is 42.

The square root of 155555385 is about 12472.1844518112. The cubic root of 155555385 is about 537.8093521182.

The spelling of 155555385 in words is "one hundred fifty-five million, five hundred fifty-five thousand, three hundred eighty-five".