26740639249 has 2 divisors, whose sum is σ = 26740639250. Its totient is φ = 26740639248.

The previous prime is 26740639241. The next prime is 26740639283. The reversal of 26740639249 is 94293604762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18176432400 + 8564206849 = 134820^2 + 92543^2 .

It is a cyclic number.

It is not a de Polignac number, because 26740639249 - 2³ = 26740639241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26740639196 and 26740639205.

It is not a weakly prime, because it can be changed into another prime (26740639241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13370319624 + 13370319625.

It is an arithmetic number, because the mean of its divisors is an integer number (13370319625).

Almost surely, 2^26740639249 is an apocalyptic number.

It is an amenable number.

26740639249 is a deficient number, since it is larger than the sum of its proper divisors (1).

26740639249 is an equidigital number, since it uses as much as digits as its factorization.

26740639249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 26740639249 in words is "twenty-six billion, seven hundred forty million, six hundred thirty-nine thousand, two hundred forty-nine".