12693555638 has 8 divisors (see below), whose sum is σ = 19504731960. Its totient is φ = 6191978320.

The previous prime is 12693555617. The next prime is 12693555653. The reversal of 12693555638 is 83655539621.

12693555638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×12693555638² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12693555638.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 77399648 + ... + 77399811.

It is an arithmetic number, because the mean of its divisors is an integer number (2438091495).

Almost surely, 2^12693555638 is an apocalyptic number.

12693555638 is a deficient number, since it is larger than the sum of its proper divisors (6811176322).

12693555638 is a wasteful number, since it uses less digits than its factorization.

12693555638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154799502.

The product of its digits is 5832000, while the sum is 53.

The spelling of 12693555638 in words is "twelve billion, six hundred ninety-three million, five hundred fifty-five thousand, six hundred thirty-eight".