26128868231 has 2 divisors, whose sum is σ = 26128868232. Its totient is φ = 26128868230.

The previous prime is 26128868197. The next prime is 26128868251. The reversal of 26128868231 is 13286882162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26128868231 - 2⁶ = 26128868167 is a prime.

It is a super-2 number, since 2×26128868231² (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 (26128868251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13064434115 + 13064434116.

It is an arithmetic number, because the mean of its divisors is an integer number (13064434116).

Almost surely, 2^26128868231 is an apocalyptic number.

26128868231 is a deficient number, since it is larger than the sum of its proper divisors (1).

26128868231 is an equidigital number, since it uses as much as digits as its factorization.

26128868231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 47.

The spelling of 26128868231 in words is "twenty-six billion, one hundred twenty-eight million, eight hundred sixty-eight thousand, two hundred thirty-one".