26454144421 has 2 divisors, whose sum is σ = 26454144422. Its totient is φ = 26454144420.

The previous prime is 26454144419. The next prime is 26454144473. The reversal of 26454144421 is 12444145462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14041065025 + 12413079396 = 118495^2 + 111414^2 .

It is a cyclic number.

It is not a de Polignac number, because 26454144421 - 2¹ = 26454144419 is a prime.

Together with 26454144419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26454144481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13227072210 + 13227072211.

It is an arithmetic number, because the mean of its divisors is an integer number (13227072211).

Almost surely, 2^26454144421 is an apocalyptic number.

It is an amenable number.

26454144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26454144421 is an equidigital number, since it uses as much as digits as its factorization.

26454144421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 37.

Adding to 26454144421 its reverse (12444145462), we get a palindrome (38898289883).

The spelling of 26454144421 in words is "twenty-six billion, four hundred fifty-four million, one hundred forty-four thousand, four hundred twenty-one".