1685016437818 has 32 divisors (see below), whose sum is σ = 2986200645120. Its totient is φ = 698072826240.

The previous prime is 1685016437803. The next prime is 1685016437879. The reversal of 1685016437818 is 8187346105861.

It is a super-2 number, since 2×1685016437818² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13403346 + ... + 13528477.

It is an arithmetic number, because the mean of its divisors is an integer number (93318770160).

Almost surely, 2^{1685016437818} is an apocalyptic number.

1685016437818 is a deficient number, since it is larger than the sum of its proper divisors (1301184207302).

1685016437818 is a wasteful number, since it uses less digits than its factorization.

1685016437818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26931982.

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 1685016437818 in words is "one trillion, six hundred eighty-five billion, sixteen million, four hundred thirty-seven thousand, eight hundred eighteen".