155405013255 has 24 divisors (see below), whose sum is σ = 269378294640. Its totient is φ = 82879718400.

The previous prime is 155405013191. The next prime is 155405013287. The reversal of 155405013255 is 552310504551.

155405013255 is a `hidden beast` number, since 1 + 5 + 540 + 50 + 13 + 2 + 55 = 666.

It is not a de Polignac number, because 155405013255 - 2⁶ = 155405013191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1904076 + ... + 1984014.

It is an arithmetic number, because the mean of its divisors is an integer number (11224095610).

Almost surely, 2^155405013255 is an apocalyptic number.

155405013255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155405013255 is a deficient number, since it is larger than the sum of its proper divisors (113973281385).

155405013255 is a wasteful number, since it uses less digits than its factorization.

155405013255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123151 (or 123148 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 155405013255 in words is "one hundred fifty-five billion, four hundred five million, thirteen thousand, two hundred fifty-five".