26539343173225 has 27 divisors (see below), whose sum is σ = 32977632400453. Its totient is φ = 21187149871040.

The previous prime is 26539343173201. The next prime is 26539343173229. The reversal of 26539343173225 is 52237134393562.

The square root of 26539343173225 is 5151635.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1237195717849 + 25302147455376 = 1112293^2 + 5030124^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26539343173225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26539343173229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18520127109 + ... + 18520128541.

Almost surely, 2^{26539343173225} is an apocalyptic number.

26539343173225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26539343173225 is the 5151635-th square number.

26539343173225 is the 2575818-th centered octagonal number.

It is an amenable number.

26539343173225 is a deficient number, since it is larger than the sum of its proper divisors (6438289227228).

26539343173225 is an frugal number, since it uses more digits than its factorization.

26539343173225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4314 (or 2157 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 55.

The spelling of 26539343173225 in words is "twenty-six trillion, five hundred thirty-nine billion, three hundred forty-three million, one hundred seventy-three thousand, two hundred twenty-five".