26694658225 has 27 divisors (see below), whose sum is σ = 33971041891. Its totient is φ = 20808713600.

The previous prime is 26694658223. The next prime is 26694658231. The reversal of 26694658225 is 52285649662.

It is a happy number.

The square root of 26694658225 is 163385.

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

It can be written as a sum of positive squares in 13 ways, for example, as 26584324209 + 110334016 = 163047^2 + 10504^2 .

It is not a de Polignac number, because 26694658225 - 2¹ = 26694658223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26694658223) 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, 33493527 + ... + 33494323.

Almost surely, 2^26694658225 is an apocalyptic number.

26694658225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26694658225 is the 163385-th square number.

26694658225 is the 81693-rd centered octagonal number.

It is an amenable number.

26694658225 is a deficient number, since it is larger than the sum of its proper divisors (7276383666).

26694658225 is an frugal number, since it uses more digits than its factorization.

26694658225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 843 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 55.

The spelling of 26694658225 in words is "twenty-six billion, six hundred ninety-four million, six hundred fifty-eight thousand, two hundred twenty-five".