26044000643 has 4 divisors (see below), whose sum is σ = 26884129728. Its totient is φ = 25203871560.

The previous prime is 26044000621. The next prime is 26044000657. The reversal of 26044000643 is 34600044062.

It is a happy number.

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 26044000643 - 2¹² = 26043996547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26044000943) 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, 420064496 + ... + 420064557.

It is an arithmetic number, because the mean of its divisors is an integer number (6721032432).

Almost surely, 2^26044000643 is an apocalyptic number.

26044000643 is a deficient number, since it is larger than the sum of its proper divisors (840129085).

26044000643 is an equidigital number, since it uses as much as digits as its factorization.

26044000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840129084.

The product of its (nonzero) digits is 13824, while the sum is 29.

The spelling of 26044000643 in words is "twenty-six billion, forty-four million, six hundred forty-three", and thus it is an aban number.