26030777561 has 2 divisors, whose sum is σ = 26030777562. Its totient is φ = 26030777560.

The previous prime is 26030777491. The next prime is 26030777611. The reversal of 26030777561 is 16577703062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25971256336 + 59521225 = 161156^2 + 7715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26030777561 is a prime.

It is a super-2 number, since 2×26030777561² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26030777161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13015388780 + 13015388781.

It is an arithmetic number, because the mean of its divisors is an integer number (13015388781).

Almost surely, 2^26030777561 is an apocalyptic number.

It is an amenable number.

26030777561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26030777561 is an equidigital number, since it uses as much as digits as its factorization.

26030777561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 26030777561 in words is "twenty-six billion, thirty million, seven hundred seventy-seven thousand, five hundred sixty-one".