26772479989 has 2 divisors, whose sum is σ = 26772479990. Its totient is φ = 26772479988.

The previous prime is 26772479963. The next prime is 26772480011. The reversal of 26772479989 is 98997427762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15838222500 + 10934257489 = 125850^2 + 104567^2 .

It is a cyclic number.

It is not a de Polignac number, because 26772479989 - 2⁵ = 26772479957 is a prime.

It is a super-2 number, since 2×26772479989² (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 (26772479939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13386239994 + 13386239995.

It is an arithmetic number, because the mean of its divisors is an integer number (13386239995).

Almost surely, 2^26772479989 is an apocalyptic number.

It is an amenable number.

26772479989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26772479989 is an equidigital number, since it uses as much as digits as its factorization.

26772479989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192036096, while the sum is 70.

The spelling of 26772479989 in words is "twenty-six billion, seven hundred seventy-two million, four hundred seventy-nine thousand, nine hundred eighty-nine".