2026856405999 has 4 divisors (see below), whose sum is σ = 2027144359680. Its totient is φ = 2026568452320.

The previous prime is 2026856405969. The next prime is 2026856406019. The reversal of 2026856405999 is 9995046586202.

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 2026856405999 - 2²⁸ = 2026587970543 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 (2026856405939) 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, 143966282 + ... + 143980359.

It is an arithmetic number, because the mean of its divisors is an integer number (506786089920).

Almost surely, 2^{2026856405999} is an apocalyptic number.

2026856405999 is a deficient number, since it is larger than the sum of its proper divisors (287953681).

2026856405999 is an equidigital number, since it uses as much as digits as its factorization.

2026856405999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287953680.

The product of its (nonzero) digits is 83980800, while the sum is 65.

The spelling of 2026856405999 in words is "two trillion, twenty-six billion, eight hundred fifty-six million, four hundred five thousand, nine hundred ninety-nine".