800856802123 has 8 divisors (see below), whose sum is σ = 915538401792. Its totient is φ = 686243573736.

The previous prime is 800856802063. The next prime is 800856802127. The reversal of 800856802123 is 321208658008.

800856802123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 800856802123 - 2¹⁷ = 800856671051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 800856802123.

It is not an unprimeable number, because it can be changed into a prime (800856802127) 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, 17067715 + ... + 17114572.

It is an arithmetic number, because the mean of its divisors is an integer number (114442300224).

Almost surely, 2^800856802123 is an apocalyptic number.

800856802123 is a deficient number, since it is larger than the sum of its proper divisors (114681599669).

800856802123 is a wasteful number, since it uses less digits than its factorization.

800856802123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34185641.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 800856802123 in words is "eight hundred billion, eight hundred fifty-six million, eight hundred two thousand, one hundred twenty-three".