26721161287 has 2 divisors, whose sum is σ = 26721161288. Its totient is φ = 26721161286.

The previous prime is 26721161273. The next prime is 26721161293. The reversal of 26721161287 is 78216112762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26721161287 - 2²³ = 26712772679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26721164287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360580643 + 13360580644.

It is an arithmetic number, because the mean of its divisors is an integer number (13360580644).

Almost surely, 2^26721161287 is an apocalyptic number.

26721161287 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721161287 is an equidigital number, since it uses as much as digits as its factorization.

26721161287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 43.

The spelling of 26721161287 in words is "twenty-six billion, seven hundred twenty-one million, one hundred sixty-one thousand, two hundred eighty-seven".