26840641225643 has 4 divisors (see below), whose sum is σ = 30675018543600. Its totient is φ = 23006263907688.

The previous prime is 26840641225633. The next prime is 26840641225663. The reversal of 26840641225643 is 34652214604862.

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 26840641225643 - 2²² = 26840637031339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26840641225633) 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, 1917188658968 + ... + 1917188658981.

It is an arithmetic number, because the mean of its divisors is an integer number (7668754635900).

Almost surely, 2^{26840641225643} is an apocalyptic number.

26840641225643 is a deficient number, since it is larger than the sum of its proper divisors (3834377317957).

26840641225643 is an equidigital number, since it uses as much as digits as its factorization.

26840641225643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834377317956.

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 26840641225643 in words is "twenty-six trillion, eight hundred forty billion, six hundred forty-one million, two hundred twenty-five thousand, six hundred forty-three".