26043649 has 4 divisors (see below), whose sum is σ = 26090964. Its totient is φ = 25996336.

The previous prime is 26043629. The next prime is 26043679. The reversal of 26043649 is 94634062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94634062 = 2 ⋅47317031.

It can be written as a sum of positive squares in 2 ways, for example, as 13191424 + 12852225 = 3632^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 26043649 - 2⁹ = 26043137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26043629) 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, 22822 + ... + 23935.

It is an arithmetic number, because the mean of its divisors is an integer number (6522741).

Almost surely, 2^26043649 is an apocalyptic number.

It is an amenable number.

26043649 is a deficient number, since it is larger than the sum of its proper divisors (47315).

26043649 is an equidigital number, since it uses as much as digits as its factorization.

26043649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47314.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 26043649 is about 5103.2978553089. The cubic root of 26043649 is about 296.4152961947.

The spelling of 26043649 in words is "twenty-six million, forty-three thousand, six hundred forty-nine".