26439933497 has 2 divisors, whose sum is σ = 26439933498. Its totient is φ = 26439933496.

The previous prime is 26439933469. The next prime is 26439933523. The reversal of 26439933497 is 79433993462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25951921216 + 488012281 = 161096^2 + 22091^2 .

It is a cyclic number.

It is not a de Polignac number, because 26439933497 - 2⁶ = 26439933433 is a prime.

It is not a weakly prime, because it can be changed into another prime (26439935497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13219966748 + 13219966749.

It is an arithmetic number, because the mean of its divisors is an integer number (13219966749).

Almost surely, 2^26439933497 is an apocalyptic number.

It is an amenable number.

26439933497 is a deficient number, since it is larger than the sum of its proper divisors (1).

26439933497 is an equidigital number, since it uses as much as digits as its factorization.

26439933497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 59.

The spelling of 26439933497 in words is "twenty-six billion, four hundred thirty-nine million, nine hundred thirty-three thousand, four hundred ninety-seven".