26481914421663 has 4 divisors (see below), whose sum is σ = 35309219228888. Its totient is φ = 17654609614440.

The previous prime is 26481914421661. The next prime is 26481914421749. The reversal of 26481914421663 is 36612441918462.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 26481914421663 - 2¹ = 26481914421661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26481914421661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4413652403608 + ... + 4413652403613.

It is an arithmetic number, because the mean of its divisors is an integer number (8827304807222).

Almost surely, 2^{26481914421663} is an apocalyptic number.

26481914421663 is a deficient number, since it is larger than the sum of its proper divisors (8827304807225).

26481914421663 is an equidigital number, since it uses as much as digits as its factorization.

26481914421663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827304807224.

The product of its digits is 11943936, while the sum is 57.

The spelling of 26481914421663 in words is "twenty-six trillion, four hundred eighty-one billion, nine hundred fourteen million, four hundred twenty-one thousand, six hundred sixty-three".