26881220831 has 2 divisors, whose sum is σ = 26881220832. Its totient is φ = 26881220830.

The previous prime is 26881220827. The next prime is 26881220837. The reversal of 26881220831 is 13802218862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26881220831 - 2² = 26881220827 is a prime.

It is a super-2 number, since 2×26881220831² (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 (26881220837) 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, 13440610415 + 13440610416.

It is an arithmetic number, because the mean of its divisors is an integer number (13440610416).

Almost surely, 2^26881220831 is an apocalyptic number.

26881220831 is a deficient number, since it is larger than the sum of its proper divisors (1).

26881220831 is an equidigital number, since it uses as much as digits as its factorization.

26881220831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 26881220831 in words is "twenty-six billion, eight hundred eighty-one million, two hundred twenty thousand, eight hundred thirty-one".