12638890265 has 8 divisors (see below), whose sum is σ = 15191658240. Its totient is φ = 10094452272.

The previous prime is 12638890249. The next prime is 12638890279. The reversal of 12638890265 is 56209883621.

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 12638890265 - 2⁴ = 12638890249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079155 + ... + 2085224.

It is an arithmetic number, because the mean of its divisors is an integer number (1898957280).

Almost surely, 2^12638890265 is an apocalyptic number.

It is an amenable number.

12638890265 is a deficient number, since it is larger than the sum of its proper divisors (2552767975).

12638890265 is an equidigital number, since it uses as much as digits as its factorization.

12638890265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164991.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 12638890265 in words is "twelve billion, six hundred thirty-eight million, eight hundred ninety thousand, two hundred sixty-five".