12638876251 has 8 divisors (see below), whose sum is σ = 13076552880. Its totient is φ = 12201323232.

The previous prime is 12638876233. The next prime is 12638876281. The reversal of 12638876251 is 15267883621.

It is a happy number.

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 12638876251 - 2⁷ = 12638876123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12638876195 and 12638876204.

It is not an unprimeable number, because it can be changed into a prime (12638876231) 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, 208741 + ... + 262393.

It is an arithmetic number, because the mean of its divisors is an integer number (1634569110).

Almost surely, 2^12638876251 is an apocalyptic number.

12638876251 is a deficient number, since it is larger than the sum of its proper divisors (437676629).

12638876251 is an equidigital number, since it uses as much as digits as its factorization.

12638876251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61805.

The product of its digits is 967680, while the sum is 49.

The spelling of 12638876251 in words is "twelve billion, six hundred thirty-eight million, eight hundred seventy-six thousand, two hundred fifty-one".