26221555455 has 16 divisors (see below), whose sum is σ = 42260729184. Its totient is φ = 13882749440.

The previous prime is 26221555441. The next prime is 26221555469. The reversal of 26221555455 is 55455512262.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26221555441) and next prime (26221555469).

It is not a de Polignac number, because 26221555455 - 2⁴ = 26221555439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6377886 + ... + 6381995.

It is an arithmetic number, because the mean of its divisors is an integer number (2641295574).

Almost surely, 2^26221555455 is an apocalyptic number.

26221555455 is a deficient number, since it is larger than the sum of its proper divisors (16039173729).

26221555455 is a wasteful number, since it uses less digits than its factorization.

26221555455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12760026.

The product of its digits is 600000, while the sum is 42.

The spelling of 26221555455 in words is "twenty-six billion, two hundred twenty-one million, five hundred fifty-five thousand, four hundred fifty-five".