26816217619 has 2 divisors, whose sum is σ = 26816217620. Its totient is φ = 26816217618.

The previous prime is 26816217599. The next prime is 26816217683. The reversal of 26816217619 is 91671261862.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26816217619 - 2¹⁷ = 26816086547 is a prime.

It is a super-2 number, since 2×26816217619² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26816217119) 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, 13408108809 + 13408108810.

It is an arithmetic number, because the mean of its divisors is an integer number (13408108810).

Almost surely, 2^26816217619 is an apocalyptic number.

26816217619 is a deficient number, since it is larger than the sum of its proper divisors (1).

26816217619 is an equidigital number, since it uses as much as digits as its factorization.

26816217619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The spelling of 26816217619 in words is "twenty-six billion, eight hundred sixteen million, two hundred seventeen thousand, six hundred nineteen".