26615999911 has 2 divisors, whose sum is σ = 26615999912. Its totient is φ = 26615999910.

The previous prime is 26615999903. The next prime is 26616000011. The reversal of 26615999911 is 11999951662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26615999911 - 2³ = 26615999903 is a prime.

It is a super-2 number, since 2×26615999911² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26615999611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13307999955 + 13307999956.

It is an arithmetic number, because the mean of its divisors is an integer number (13307999956).

Almost surely, 2^26615999911 is an apocalyptic number.

26615999911 is a deficient number, since it is larger than the sum of its proper divisors (1).

26615999911 is an equidigital number, since it uses as much as digits as its factorization.

26615999911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 58.

The spelling of 26615999911 in words is "twenty-six billion, six hundred fifteen million, nine hundred ninety-nine thousand, nine hundred eleven".