26026400549 has 2 divisors, whose sum is σ = 26026400550. Its totient is φ = 26026400548.

The previous prime is 26026400539. The next prime is 26026400567. The reversal of 26026400549 is 94500462062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25988664100 + 37736449 = 161210^2 + 6143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26026400549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26026400509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13013200274 + 13013200275.

It is an arithmetic number, because the mean of its divisors is an integer number (13013200275).

Almost surely, 2^26026400549 is an apocalyptic number.

It is an amenable number.

26026400549 is a deficient number, since it is larger than the sum of its proper divisors (1).

26026400549 is an equidigital number, since it uses as much as digits as its factorization.

26026400549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 26026400549 in words is "twenty-six billion, twenty-six million, four hundred thousand, five hundred forty-nine".