26310355381 has 2 divisors, whose sum is σ = 26310355382. Its totient is φ = 26310355380.

The previous prime is 26310355343. The next prime is 26310355387. The reversal of 26310355381 is 18355301362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26176004100 + 134351281 = 161790^2 + 11591^2 .

It is a cyclic number.

It is not a de Polignac number, because 26310355381 - 2¹⁷ = 26310224309 is a prime.

It is a super-2 number, since 2×26310355381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26310355381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26310355387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13155177690 + 13155177691.

It is an arithmetic number, because the mean of its divisors is an integer number (13155177691).

Almost surely, 2^26310355381 is an apocalyptic number.

It is an amenable number.

26310355381 is a deficient number, since it is larger than the sum of its proper divisors (1).

26310355381 is an equidigital number, since it uses as much as digits as its factorization.

26310355381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 26310355381 in words is "twenty-six billion, three hundred ten million, three hundred fifty-five thousand, three hundred eighty-one".