12638899001 has 2 divisors, whose sum is σ = 12638899002. Its totient is φ = 12638899000.

The previous prime is 12638898983. The next prime is 12638899003. The reversal of 12638899001 is 10099883621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10060290601 + 2578608400 = 100301^2 + 50780^2 .

It is a cyclic number.

It is not a de Polignac number, because 12638899001 - 2¹⁰ = 12638897977 is a prime.

Together with 12638899003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12638899003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319449500 + 6319449501.

It is an arithmetic number, because the mean of its divisors is an integer number (6319449501).

Almost surely, 2^12638899001 is an apocalyptic number.

It is an amenable number.

12638899001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638899001 is an equidigital number, since it uses as much as digits as its factorization.

12638899001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 12638899001 in words is "twelve billion, six hundred thirty-eight million, eight hundred ninety-nine thousand, one".