26454505669 has 2 divisors, whose sum is σ = 26454505670. Its totient is φ = 26454505668.

The previous prime is 26454505663. The next prime is 26454505739. The reversal of 26454505669 is 96650545462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21318920100 + 5135585569 = 146010^2 + 71663^2 .

It is a cyclic number.

It is not a de Polignac number, because 26454505669 - 2²¹ = 26452408517 is a prime.

It is a super-2 number, since 2×26454505669² (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 (26454505663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13227252834 + 13227252835.

It is an arithmetic number, because the mean of its divisors is an integer number (13227252835).

Almost surely, 2^26454505669 is an apocalyptic number.

It is an amenable number.

26454505669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26454505669 is an equidigital number, since it uses as much as digits as its factorization.

26454505669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 52.

The spelling of 26454505669 in words is "twenty-six billion, four hundred fifty-four million, five hundred five thousand, six hundred sixty-nine".