26401499899 has 2 divisors, whose sum is σ = 26401499900. Its totient is φ = 26401499898.

The previous prime is 26401499843. The next prime is 26401499911. The reversal of 26401499899 is 99899410462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26401499899 - 2⁹ = 26401499387 is a prime.

It is not a weakly prime, because it can be changed into another prime (26401499809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200749949 + 13200749950.

It is an arithmetic number, because the mean of its divisors is an integer number (13200749950).

Almost surely, 2^26401499899 is an apocalyptic number.

26401499899 is a deficient number, since it is larger than the sum of its proper divisors (1).

26401499899 is an equidigital number, since it uses as much as digits as its factorization.

26401499899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The spelling of 26401499899 in words is "twenty-six billion, four hundred one million, four hundred ninety-nine thousand, eight hundred ninety-nine".