856276323903 has 192 divisors, whose sum is σ = 1675232133120. Its totient is φ = 407012947200.

The previous prime is 856276323871. The next prime is 856276323907. The reversal of 856276323903 is 309323672658.

It is a happy number.

856276323903 is a `hidden beast` number, since 8 + 5 + 627 + 6 + 3 + 2 + 3 + 9 + 0 + 3 = 666.

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

It is not a de Polignac number, because 856276323903 - 2⁵ = 856276323871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856276323903.

It is a congruent 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 191 ways as a sum of consecutive naturals, for example, 1055827368 + ... + 1055828178.

It is an arithmetic number, because the mean of its divisors is an integer number (8725167360).

Almost surely, 2^856276323903 is an apocalyptic number.

856276323903 is a deficient number, since it is larger than the sum of its proper divisors (818955809217).

856276323903 is a wasteful number, since it uses less digits than its factorization.

856276323903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730 (or 1727 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 856276323903 in words is "eight hundred fifty-six billion, two hundred seventy-six million, three hundred twenty-three thousand, nine hundred three".