26471324921 has 2 divisors, whose sum is σ = 26471324922. Its totient is φ = 26471324920.

The previous prime is 26471324861. The next prime is 26471324923. The reversal of 26471324921 is 12942317462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25491634921 + 979690000 = 159661^2 + 31300^2 .

It is a cyclic number.

It is not a de Polignac number, because 26471324921 - 2¹⁰ = 26471323897 is a prime.

Together with 26471324923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26471324923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13235662460 + 13235662461.

It is an arithmetic number, because the mean of its divisors is an integer number (13235662461).

Almost surely, 2^26471324921 is an apocalyptic number.

It is an amenable number.

26471324921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26471324921 is an equidigital number, since it uses as much as digits as its factorization.

26471324921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The spelling of 26471324921 in words is "twenty-six billion, four hundred seventy-one million, three hundred twenty-four thousand, nine hundred twenty-one".