26111696921 has 2 divisors, whose sum is σ = 26111696922. Its totient is φ = 26111696920.

The previous prime is 26111696899. The next prime is 26111696929. The reversal of 26111696921 is 12969611162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20596555225 + 5515141696 = 143515^2 + 74264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26111696921 is a prime.

It is not a weakly prime, because it can be changed into another prime (26111696929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13055848460 + 13055848461.

It is an arithmetic number, because the mean of its divisors is an integer number (13055848461).

Almost surely, 2^26111696921 is an apocalyptic number.

It is an amenable number.

26111696921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26111696921 is an equidigital number, since it uses as much as digits as its factorization.

26111696921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The spelling of 26111696921 in words is "twenty-six billion, one hundred eleven million, six hundred ninety-six thousand, nine hundred twenty-one".