26222382721 has 2 divisors, whose sum is σ = 26222382722. Its totient is φ = 26222382720.

The previous prime is 26222382713. The next prime is 26222382737. The reversal of 26222382721 is 12728322262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26166297600 + 56085121 = 161760^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 26222382721 - 2³ = 26222382713 is a prime.

It is a super-2 number, since 2×26222382721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26222382761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13111191360 + 13111191361.

It is an arithmetic number, because the mean of its divisors is an integer number (13111191361).

Almost surely, 2^26222382721 is an apocalyptic number.

It is an amenable number.

26222382721 is a deficient number, since it is larger than the sum of its proper divisors (1).

26222382721 is an equidigital number, since it uses as much as digits as its factorization.

26222382721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The spelling of 26222382721 in words is "twenty-six billion, two hundred twenty-two million, three hundred eighty-two thousand, seven hundred twenty-one".