26055135221 has 8 divisors (see below), whose sum is σ = 27591360984. Its totient is φ = 24519306240.

The previous prime is 26055135217. The next prime is 26055135251. The reversal of 26055135221 is 12253155062.

It can be written as a sum of positive squares in 4 ways, for example, as 19463319121 + 6591816100 = 139511^2 + 81190^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26055135221 - 2² = 26055135217 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 (26055135251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41741 + ... + 232061.

It is an arithmetic number, because the mean of its divisors is an integer number (3448920123).

Almost surely, 2^26055135221 is an apocalyptic number.

It is an amenable number.

26055135221 is a deficient number, since it is larger than the sum of its proper divisors (1536225763).

26055135221 is a wasteful number, since it uses less digits than its factorization.

26055135221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198391.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 26055135221 in words is "twenty-six billion, fifty-five million, one hundred thirty-five thousand, two hundred twenty-one".