26627889991 has 2 divisors, whose sum is σ = 26627889992. Its totient is φ = 26627889990.

The previous prime is 26627889989. The next prime is 26627890013. The reversal of 26627889991 is 19998872662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26627889991 - 2¹ = 26627889989 is a prime.

Together with 26627889989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26627889091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13313944995 + 13313944996.

It is an arithmetic number, because the mean of its divisors is an integer number (13313944996).

Almost surely, 2^26627889991 is an apocalyptic number.

26627889991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26627889991 is an equidigital number, since it uses as much as digits as its factorization.

26627889991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 67.

The spelling of 26627889991 in words is "twenty-six billion, six hundred twenty-seven million, eight hundred eighty-nine thousand, nine hundred ninety-one".