16885534858 has 4 divisors (see below), whose sum is σ = 25328302290. Its totient is φ = 8442767428.

The previous prime is 16885534843. The next prime is 16885534871. The reversal of 16885534858 is 85843558861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16662420889 + 223113969 = 129083^2 + 14937^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16885534796 and 16885534805.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221383713 + ... + 4221383716.

Almost surely, 2^16885534858 is an apocalyptic number.

16885534858 is a deficient number, since it is larger than the sum of its proper divisors (8442767432).

16885534858 is an equidigital number, since it uses as much as digits as its factorization.

16885534858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442767431.

The product of its digits is 36864000, while the sum is 61.

The spelling of 16885534858 in words is "sixteen billion, eight hundred eighty-five million, five hundred thirty-four thousand, eight hundred fifty-eight".