12638367863 has 8 divisors (see below), whose sum is σ = 14047448976. Its totient is φ = 11272643200.

The previous prime is 12638367857. The next prime is 12638367869. The reversal of 12638367863 is 36876383621.

It is an interprime number because it is at equal distance from previous prime (12638367857) and next prime (12638367869).

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

It is a cyclic number.

It is not a de Polignac number, because 12638367863 - 2⁶ = 12638367799 is a prime.

It is a super-2 number, since 2×12638367863² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638367869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10838498 + ... + 10839663.

It is an arithmetic number, because the mean of its divisors is an integer number (1755931122).

Almost surely, 2^12638367863 is an apocalyptic number.

12638367863 is a deficient number, since it is larger than the sum of its proper divisors (1409081113).

12638367863 is a wasteful number, since it uses less digits than its factorization.

12638367863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21678225.

The product of its digits is 5225472, while the sum is 53.

The spelling of 12638367863 in words is "twelve billion, six hundred thirty-eight million, three hundred sixty-seven thousand, eight hundred sixty-three".