26310000721 has 2 divisors, whose sum is σ = 26310000722. Its totient is φ = 26310000720.

The previous prime is 26310000713. The next prime is 26310000767. The reversal of 26310000721 is 12700001362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15548843025 + 10761157696 = 124695^2 + 103736^2 .

It is a cyclic number.

It is not a de Polignac number, because 26310000721 - 2³ = 26310000713 is a prime.

It is a super-2 number, since 2×26310000721² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26310000692 and 26310000701.

It is not a weakly prime, because it can be changed into another prime (26310000791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13155000360 + 13155000361.

It is an arithmetic number, because the mean of its divisors is an integer number (13155000361).

Almost surely, 2^26310000721 is an apocalyptic number.

It is an amenable number.

26310000721 is a deficient number, since it is larger than the sum of its proper divisors (1).

26310000721 is an equidigital number, since it uses as much as digits as its factorization.

26310000721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The spelling of 26310000721 in words is "twenty-six billion, three hundred ten million, seven hundred twenty-one", and thus it is an aban number.