15135123555 has 24 divisors (see below), whose sum is σ = 26874076320. Its totient is φ = 7875185280.

The previous prime is 15135123539. The next prime is 15135123587. The reversal of 15135123555 is 55532153151.

15135123555 is a `hidden beast` number, since 1 + 51 + 3 + 51 + 2 + 3 + 555 = 666.

15135123555 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 15135123555 - 2⁴ = 15135123539 is a prime.

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, 4099815 + ... + 4103504.

It is an arithmetic number, because the mean of its divisors is an integer number (1119753180).

Almost surely, 2^15135123555 is an apocalyptic number.

15135123555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15135123555 is a deficient number, since it is larger than the sum of its proper divisors (11738952765).

15135123555 is a wasteful number, since it uses less digits than its factorization.

15135123555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203371 (or 8203368 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 15135123555 in words is "fifteen billion, one hundred thirty-five million, one hundred twenty-three thousand, five hundred fifty-five".