26218254575545 has 64 divisors (see below), whose sum is σ = 33988684492800. Its totient is φ = 19352388533760.

The previous prime is 26218254575531. The next prime is 26218254575549. The reversal of 26218254575545 is 54557545281262.

It is a happy number.

It is not a de Polignac number, because 26218254575545 - 2²¹ = 26218252478393 is a prime.

It is a super-2 number, since 2×26218254575545² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26218254575549) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 2443675741 + ... + 2443686469.

It is an arithmetic number, because the mean of its divisors is an integer number (531073195200).

Almost surely, 2^{26218254575545} is an apocalyptic number.

It is an amenable number.

26218254575545 is a deficient number, since it is larger than the sum of its proper divisors (7770429917255).

26218254575545 is a wasteful number, since it uses less digits than its factorization.

26218254575545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13438.

The product of its digits is 134400000, while the sum is 61.

The spelling of 26218254575545 in words is "twenty-six trillion, two hundred eighteen billion, two hundred fifty-four million, five hundred seventy-five thousand, five hundred forty-five".