12637831009 has 2 divisors, whose sum is σ = 12637831010. Its totient is φ = 12637831008.

The previous prime is 12637831001. The next prime is 12637831169. The reversal of 12637831009 is 90013873621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10973191009 + 1664640000 = 104753^2 + 40800^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637831009 - 2³ = 12637831001 is a prime.

It is a super-2 number, since 2×12637831009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12637831001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318915504 + 6318915505.

It is an arithmetic number, because the mean of its divisors is an integer number (6318915505).

Almost surely, 2^12637831009 is an apocalyptic number.

It is an amenable number.

12637831009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637831009 is an equidigital number, since it uses as much as digits as its factorization.

12637831009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 12637831009 in words is "twelve billion, six hundred thirty-seven million, eight hundred thirty-one thousand, nine".