817018708858 has 16 divisors (see below), whose sum is σ = 1338162928416. Its totient is φ = 371032356240.

The previous prime is 817018708853. The next prime is 817018708879. The reversal of 817018708858 is 858807810718.

It is a junction number, because it is equal to n+sod(n) for n = 817018708796 and 817018708805.

It is not an unprimeable number, because it can be changed into a prime (817018708853) 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, 16964616 + ... + 17012707.

It is an arithmetic number, because the mean of its divisors is an integer number (83635183026).

Almost surely, 2^817018708858 is an apocalyptic number.

817018708858 is a deficient number, since it is larger than the sum of its proper divisors (521144219558).

817018708858 is a wasteful number, since it uses less digits than its factorization.

817018708858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33978429.

The product of its (nonzero) digits is 8028160, while the sum is 61.

The spelling of 817018708858 in words is "eight hundred seventeen billion, eighteen million, seven hundred eight thousand, eight hundred fifty-eight".