12551126669 has 2 divisors, whose sum is σ = 12551126670. Its totient is φ = 12551126668.

The previous prime is 12551126633. The next prime is 12551126701. The reversal of 12551126669 is 96662115521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12550720900 + 405769 = 112030^2 + 637^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551126669 - 2²⁴ = 12534349453 is a prime.

It is a super-2 number, since 2×12551126669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551126629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275563334 + 6275563335.

It is an arithmetic number, because the mean of its divisors is an integer number (6275563335).

Almost surely, 2^12551126669 is an apocalyptic number.

It is an amenable number.

12551126669 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551126669 is an equidigital number, since it uses as much as digits as its factorization.

12551126669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The spelling of 12551126669 in words is "twelve billion, five hundred fifty-one million, one hundred twenty-six thousand, six hundred sixty-nine".