26418212218225 has 45 divisors (see below), whose sum is σ = 34815758038597. Its totient is φ = 19885767614720.

The previous prime is 26418212218187. The next prime is 26418212218291. The reversal of 26418212218225 is 52281221281462.

The square root of 26418212218225 is 5139865.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 22 ways, for example, as 26406371296369 + 11840921856 = 5138713^2 + 108816^2 .

It is not a de Polignac number, because 26418212218225 - 2⁹ = 26418212217713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 7427103147 + ... + 7427106703.

Almost surely, 2^{26418212218225} is an apocalyptic number.

26418212218225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26418212218225 is the 5139865-th square number.

26418212218225 is the 2569933-rd centered octagonal number.

It is an amenable number.

26418212218225 is a deficient number, since it is larger than the sum of its proper divisors (8397545820372).

26418212218225 is an frugal number, since it uses more digits than its factorization.

26418212218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192 (or 3579 counting only the distinct ones).

The product of its digits is 491520, while the sum is 46.

Adding to 26418212218225 its reverse (52281221281462), we get a palindrome (78699433499687).

The spelling of 26418212218225 in words is "twenty-six trillion, four hundred eighteen billion, two hundred twelve million, two hundred eighteen thousand, two hundred twenty-five".