26923078549 has 2 divisors, whose sum is σ = 26923078550. Its totient is φ = 26923078548.

The previous prime is 26923078387. The next prime is 26923078583. The reversal of 26923078549 is 94587032962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19118592900 + 7804485649 = 138270^2 + 88343^2 .

It is a cyclic number.

It is not a de Polignac number, because 26923078549 - 2¹¹ = 26923076501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26923078549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26923078649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13461539274 + 13461539275.

It is an arithmetic number, because the mean of its divisors is an integer number (13461539275).

Almost surely, 2^26923078549 is an apocalyptic number.

It is an amenable number.

26923078549 is a deficient number, since it is larger than the sum of its proper divisors (1).

26923078549 is an equidigital number, since it uses as much as digits as its factorization.

26923078549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 26923078549 in words is "twenty-six billion, nine hundred twenty-three million, seventy-eight thousand, five hundred forty-nine".