26561545 has 4 divisors (see below), whose sum is σ = 31873860. Its totient is φ = 21249232.

The previous prime is 26561539. The next prime is 26561551. The reversal of 26561545 is 54516562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54516562 = 2 ⋅27258281.

It is an interprime number because it is at equal distance from previous prime (26561539) and next prime (26561551).

It can be written as a sum of positive squares in 2 ways, for example, as 19395216 + 7166329 = 4404^2 + 2677^2 .

It is a cyclic number.

It is not a de Polignac number, because 26561545 - 2¹¹ = 26559497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26561545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2656150 + ... + 2656159.

It is an arithmetic number, because the mean of its divisors is an integer number (7968465).

Almost surely, 2^26561545 is an apocalyptic number.

It is an amenable number.

26561545 is a deficient number, since it is larger than the sum of its proper divisors (5312315).

26561545 is an equidigital number, since it uses as much as digits as its factorization.

26561545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312314.

The product of its digits is 36000, while the sum is 34.

The square root of 26561545 is about 5153.7893825805. The cubic root of 26561545 is about 298.3672221697.

The spelling of 26561545 in words is "twenty-six million, five hundred sixty-one thousand, five hundred forty-five".