26821568419 has 2 divisors, whose sum is σ = 26821568420. Its totient is φ = 26821568418.

The previous prime is 26821568357. The next prime is 26821568429. The reversal of 26821568419 is 91486512862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26821568419 - 2¹⁵ = 26821535651 is a prime.

It is a super-2 number, since 2×26821568419² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26821568429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13410784209 + 13410784210.

It is an arithmetic number, because the mean of its divisors is an integer number (13410784210).

Almost surely, 2^26821568419 is an apocalyptic number.

26821568419 is a deficient number, since it is larger than the sum of its proper divisors (1).

26821568419 is an equidigital number, since it uses as much as digits as its factorization.

26821568419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 52.

The spelling of 26821568419 in words is "twenty-six billion, eight hundred twenty-one million, five hundred sixty-eight thousand, four hundred nineteen".