155504320113123 has 16 divisors (see below), whose sum is σ = 230527245302400. Its totient is φ = 103601833098120.

The previous prime is 155504320113101. The next prime is 155504320113187. The reversal of 155504320113123 is 321311023405551.

It is a happy number.

155504320113123 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 0 + 4 + 320 + 11 + 312 + 3 = 666.

It is not a de Polignac number, because 155504320113123 - 2²⁴ = 155504303335907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155504320113323) 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, 1880892453 + ... + 1880975126.

It is an arithmetic number, because the mean of its divisors is an integer number (14407952831400).

Almost surely, 2^{155504320113123} is an apocalyptic number.

155504320113123 is a deficient number, since it is larger than the sum of its proper divisors (75022925189277).

155504320113123 is a wasteful number, since it uses less digits than its factorization.

155504320113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761869119 (or 3761869113 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 155504320113123 its reverse (321311023405551), we get a palindrome (476815343518674).

The spelling of 155504320113123 in words is "one hundred fifty-five trillion, five hundred four billion, three hundred twenty million, one hundred thirteen thousand, one hundred twenty-three".