12269638538 has 8 divisors (see below), whose sum is σ = 18404931780. Its totient is φ = 6134661280.

The previous prime is 12269638501. The next prime is 12269638547. The reversal of 12269638538 is 83583696221.

It can be written as a sum of positive squares in 2 ways, for example, as 12269328289 + 310249 = 110767^2 + 557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12269638538.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 92828 + ... + 182088.

Almost surely, 2^12269638538 is an apocalyptic number.

12269638538 is a deficient number, since it is larger than the sum of its proper divisors (6135293242).

12269638538 is an equidigital number, since it uses as much as digits as its factorization.

12269638538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157992.

The product of its digits is 3732480, while the sum is 53.

The spelling of 12269638538 in words is "twelve billion, two hundred sixty-nine million, six hundred thirty-eight thousand, five hundred thirty-eight".