26198400913 has 2 divisors, whose sum is σ = 26198400914. Its totient is φ = 26198400912.

The previous prime is 26198400911. The next prime is 26198400947. The reversal of 26198400913 is 31900489162.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18194772544 + 8003628369 = 134888^2 + 89463^2 .

It is a cyclic number.

It is not a de Polignac number, because 26198400913 - 2¹ = 26198400911 is a prime.

Together with 26198400911, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26198400913.

It is not a weakly prime, because it can be changed into another prime (26198400911) 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, 13099200456 + 13099200457.

It is an arithmetic number, because the mean of its divisors is an integer number (13099200457).

Almost surely, 2^26198400913 is an apocalyptic number.

It is an amenable number.

26198400913 is a deficient number, since it is larger than the sum of its proper divisors (1).

26198400913 is an equidigital number, since it uses as much as digits as its factorization.

26198400913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 26198400913 in words is "twenty-six billion, one hundred ninety-eight million, four hundred thousand, nine hundred thirteen".