856276323905 has 8 divisors (see below), whose sum is σ = 1037705169384. Its totient is φ = 678238672000.

The previous prime is 856276323871. The next prime is 856276323907. The reversal of 856276323905 is 509323672658.

856276323905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 925352²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 308260364944 + 548015958961 = 555212^2 + 740281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 856276323905 - 2¹² = 856276319809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856276323907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 847797836 + ... + 847798845.

It is an arithmetic number, because the mean of its divisors is an integer number (129713146173).

Almost surely, 2^856276323905 is an apocalyptic number.

It is an amenable number.

856276323905 is a deficient number, since it is larger than the sum of its proper divisors (181428845479).

856276323905 is a wasteful number, since it uses less digits than its factorization.

856276323905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695596787.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 856276323905 in words is "eight hundred fifty-six billion, two hundred seventy-six million, three hundred twenty-three thousand, nine hundred five".