26856402329 has 4 divisors (see below), whose sum is σ = 27722737920. Its totient is φ = 25990066740.

The previous prime is 26856402311. The next prime is 26856402337. The reversal of 26856402329 is 92320465862.

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 not a de Polignac number, because 26856402329 - 2²⁰ = 26855353753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26856407329) 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, 433167749 + ... + 433167810.

It is an arithmetic number, because the mean of its divisors is an integer number (6930684480).

Almost surely, 2^26856402329 is an apocalyptic number.

It is an amenable number.

26856402329 is a deficient number, since it is larger than the sum of its proper divisors (866335591).

26856402329 is an equidigital number, since it uses as much as digits as its factorization.

26856402329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866335590.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 26856402329 in words is "twenty-six billion, eight hundred fifty-six million, four hundred two thousand, three hundred twenty-nine".