26943581025 has 81 divisors (see below), whose sum is σ = 50007568377. Its totient is φ = 13866969600.

The previous prime is 26943581017. The next prime is 26943581117. The reversal of 26943581025 is 52018534962.

The square root of 26943581025 is 164145.

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

26943581025 is a `hidden beast` number, since 2 + 6 + 9 + 43 + 581 + 0 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1475251281 + 25468329744 = 38409^2 + 159588^2 .

It is not a de Polignac number, because 26943581025 - 2³ = 26943581017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 76327249 + ... + 76327601.

Almost surely, 2^26943581025 is an apocalyptic number.

26943581025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26943581025 is the 164145-th square number.

26943581025 is the 82073-rd centered octagonal number.

It is an amenable number.

26943581025 is a deficient number, since it is larger than the sum of its proper divisors (23063987352).

26943581025 is an equidigital number, since it uses as much as digits as its factorization.

26943581025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 26943581025 in words is "twenty-six billion, nine hundred forty-three million, five hundred eighty-one thousand, twenty-five".