12638775273 has 16 divisors (see below), whose sum is σ = 18458254080. Its totient is φ = 7656755456.

The previous prime is 12638775271. The next prime is 12638775323. The reversal of 12638775273 is 37257783621.

It is a cyclic number.

It is not a de Polignac number, because 12638775273 - 2¹ = 12638775271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (12638775271) 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, 4271265 + ... + 4274222.

It is an arithmetic number, because the mean of its divisors is an integer number (1153640880).

Almost surely, 2^12638775273 is an apocalyptic number.

It is an amenable number.

12638775273 is a deficient number, since it is larger than the sum of its proper divisors (5819478807).

12638775273 is a wasteful number, since it uses less digits than its factorization.

12638775273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545536.

The product of its digits is 2963520, while the sum is 51.

The spelling of 12638775273 in words is "twelve billion, six hundred thirty-eight million, seven hundred seventy-five thousand, two hundred seventy-three".