26551744669 has 2 divisors, whose sum is σ = 26551744670. Its totient is φ = 26551744668.

The previous prime is 26551744633. The next prime is 26551744691. The reversal of 26551744669 is 96644715562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14754960900 + 11796783769 = 121470^2 + 108613^2 .

It is a cyclic number.

It is not a de Polignac number, because 26551744669 - 2²³ = 26543356061 is a prime.

It is a super-2 number, since 2×26551744669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26551742669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13275872334 + 13275872335.

It is an arithmetic number, because the mean of its divisors is an integer number (13275872335).

Almost surely, 2^26551744669 is an apocalyptic number.

It is an amenable number.

26551744669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26551744669 is an equidigital number, since it uses as much as digits as its factorization.

26551744669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 55.

The spelling of 26551744669 in words is "twenty-six billion, five hundred fifty-one million, seven hundred forty-four thousand, six hundred sixty-nine".