26909011639 has 2 divisors, whose sum is σ = 26909011640. Its totient is φ = 26909011638.

The previous prime is 26909011631. The next prime is 26909011691. The reversal of 26909011639 is 93611090962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26909011639 - 2³ = 26909011631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26909011631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13454505819 + 13454505820.

It is an arithmetic number, because the mean of its divisors is an integer number (13454505820).

Almost surely, 2^26909011639 is an apocalyptic number.

26909011639 is a deficient number, since it is larger than the sum of its proper divisors (1).

26909011639 is an equidigital number, since it uses as much as digits as its factorization.

26909011639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 26909011639 in words is "twenty-six billion, nine hundred nine million, eleven thousand, six hundred thirty-nine".