26564861 has 8 divisors (see below), whose sum is σ = 27494400. Its totient is φ = 25639920.

The previous prime is 26564851. The next prime is 26564873. The reversal of 26564861 is 16846562.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26564861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26564821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13955 + ... + 15743.

It is an arithmetic number, because the mean of its divisors is an integer number (3436800).

Almost surely, 2^26564861 is an apocalyptic number.

It is an amenable number.

26564861 is a deficient number, since it is larger than the sum of its proper divisors (929539).

26564861 is a wasteful number, since it uses less digits than its factorization.

26564861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299.

The product of its digits is 69120, while the sum is 38.

The square root of 26564861 is about 5154.1110775768. Note that the first 3 decimals coincide. The cubic root of 26564861 is about 298.3796379201.

The spelling of 26564861 in words is "twenty-six million, five hundred sixty-four thousand, eight hundred sixty-one".