26721459899 has 2 divisors, whose sum is σ = 26721459900. Its totient is φ = 26721459898.

The previous prime is 26721459851. The next prime is 26721459929. The reversal of 26721459899 is 99895412762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26721459899 - 2²⁸ = 26453024443 is a prime.

It is a super-3 number, since 3×26721459899³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (26721452899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360729949 + 13360729950.

It is an arithmetic number, because the mean of its divisors is an integer number (13360729950).

Almost surely, 2^26721459899 is an apocalyptic number.

26721459899 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721459899 is an equidigital number, since it uses as much as digits as its factorization.

26721459899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 62.

The spelling of 26721459899 in words is "twenty-six billion, seven hundred twenty-one million, four hundred fifty-nine thousand, eight hundred ninety-nine".