26744561 has 4 divisors (see below), whose sum is σ = 27907392. Its totient is φ = 25581732.

The previous prime is 26744539. The next prime is 26744563. The reversal of 26744561 is 16544762.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26744561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26744563) 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, 581381 + ... + 581426.

It is an arithmetic number, because the mean of its divisors is an integer number (6976848).

Almost surely, 2^26744561 is an apocalyptic number.

It is an amenable number.

26744561 is a deficient number, since it is larger than the sum of its proper divisors (1162831).

26744561 is a wasteful number, since it uses less digits than its factorization.

26744561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162830.

The product of its digits is 40320, while the sum is 35.

The square root of 26744561 is about 5171.5143816874. The cubic root of 26744561 is about 299.0509303518.

The spelling of 26744561 in words is "twenty-six million, seven hundred forty-four thousand, five hundred sixty-one".