12742378155 has 24 divisors (see below), whose sum is σ = 23785773648. Its totient is φ = 6273170496.

The previous prime is 12742378133. The next prime is 12742378171. The reversal of 12742378155 is 55187324721.

12742378155 is a `hidden beast` number, since 1 + 2 + 7 + 423 + 78 + 155 = 666.

12742378155 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 12742378155 - 2⁵ = 12742378123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12742378155.

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, 10890337 + ... + 10891506.

It is an arithmetic number, because the mean of its divisors is an integer number (991073902).

Almost surely, 2^12742378155 is an apocalyptic number.

12742378155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12742378155 is a deficient number, since it is larger than the sum of its proper divisors (11043395493).

12742378155 is a wasteful number, since it uses less digits than its factorization.

12742378155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21781867 (or 21781864 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 12742378155 in words is "twelve billion, seven hundred forty-two million, three hundred seventy-eight thousand, one hundred fifty-five".