856586426818 has 8 divisors (see below), whose sum is σ = 1285344006912. Its totient is φ = 428138424516.

The previous prime is 856586426791. The next prime is 856586426819. The reversal of 856586426818 is 818624685658.

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

It is not an unprimeable number, because it can be changed into a prime (856586426819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77387530 + ... + 77398597.

It is an arithmetic number, because the mean of its divisors is an integer number (160668000864).

Almost surely, 2^856586426818 is an apocalyptic number.

856586426818 is a deficient number, since it is larger than the sum of its proper divisors (428757580094).

856586426818 is a wasteful number, since it uses less digits than its factorization.

856586426818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154788896.

The product of its digits is 176947200, while the sum is 67.

The spelling of 856586426818 in words is "eight hundred fifty-six billion, five hundred eighty-six million, four hundred twenty-six thousand, eight hundred eighteen".