26556655521 has 32 divisors (see below), whose sum is σ = 39242990592. Its totient is φ = 15840567360.

The previous prime is 26556655511. The next prime is 26556655523. The reversal of 26556655521 is 12555665562.

It is not a de Polignac number, because 26556655521 - 2⁶ = 26556655457 is a prime.

It is a super-2 number, since 2×26556655521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26556655523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530071 + ... + 578003.

It is an arithmetic number, because the mean of its divisors is an integer number (1226343456).

Almost surely, 2^26556655521 is an apocalyptic number.

It is an amenable number.

26556655521 is a deficient number, since it is larger than the sum of its proper divisors (12686335071).

26556655521 is a wasteful number, since it uses less digits than its factorization.

26556655521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48213.

The product of its digits is 2700000, while the sum is 48.

The spelling of 26556655521 in words is "twenty-six billion, five hundred fifty-six million, six hundred fifty-five thousand, five hundred twenty-one".