26556791 has 4 divisors (see below), whose sum is σ = 26576592. Its totient is φ = 26536992.

The previous prime is 26556781. The next prime is 26556793. The reversal of 26556791 is 19765562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26556791 - 2¹⁸ = 26294647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26556793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7730 + ... + 10623.

It is an arithmetic number, because the mean of its divisors is an integer number (6644148).

Almost surely, 2^26556791 is an apocalyptic number.

26556791 is a deficient number, since it is larger than the sum of its proper divisors (19801).

26556791 is a wasteful number, since it uses less digits than its factorization.

26556791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19800.

The product of its digits is 113400, while the sum is 41.

The square root of 26556791 is about 5153.3281479060. The cubic root of 26556791 is about 298.3494204642.

The spelling of 26556791 in words is "twenty-six million, five hundred fifty-six thousand, seven hundred ninety-one".