26806565 has 8 divisors (see below), whose sum is σ = 32225688. Its totient is φ = 21406720.

The previous prime is 26806541. The next prime is 26806583. The reversal of 26806565 is 56560862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11930116 + 14876449 = 3454^2 + 3857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26806565 - 2¹⁸ = 26544421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556 + ... + 7485.

It is an arithmetic number, because the mean of its divisors is an integer number (4028211).

Almost surely, 2^26806565 is an apocalyptic number.

It is an amenable number.

26806565 is a deficient number, since it is larger than the sum of its proper divisors (5419123).

26806565 is an equidigital number, since it uses as much as digits as its factorization.

26806565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9639.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 26806565 is about 5177.5056735845. The cubic root of 26806565 is about 299.2818563448.

The spelling of 26806565 in words is "twenty-six million, eight hundred six thousand, five hundred sixty-five".