26442167231 has 2 divisors, whose sum is σ = 26442167232. Its totient is φ = 26442167230.

The previous prime is 26442167221. The next prime is 26442167273. The reversal of 26442167231 is 13276124462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26442167231 is a prime.

It is a super-2 number, since 2×26442167231² (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 (26442167221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13221083615 + 13221083616.

It is an arithmetic number, because the mean of its divisors is an integer number (13221083616).

Almost surely, 2^26442167231 is an apocalyptic number.

26442167231 is a deficient number, since it is larger than the sum of its proper divisors (1).

26442167231 is an equidigital number, since it uses as much as digits as its factorization.

26442167231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The spelling of 26442167231 in words is "twenty-six billion, four hundred forty-two million, one hundred sixty-seven thousand, two hundred thirty-one".