15138805155 has 16 divisors (see below), whose sum is σ = 24528698880. Its totient is φ = 7971825888.

The previous prime is 15138805153. The next prime is 15138805207. The reversal of 15138805155 is 55150883151.

It is not a de Polignac number, because 15138805155 - 2¹ = 15138805153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15138805153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6386497 + ... + 6388866.

It is an arithmetic number, because the mean of its divisors is an integer number (1533043680).

Almost surely, 2^15138805155 is an apocalyptic number.

15138805155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15138805155 is a deficient number, since it is larger than the sum of its proper divisors (9389893725).

15138805155 is a wasteful number, since it uses less digits than its factorization.

15138805155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12775450.

The product of its (nonzero) digits is 120000, while the sum is 42.

The spelling of 15138805155 in words is "fifteen billion, one hundred thirty-eight million, eight hundred five thousand, one hundred fifty-five".