1698118864 has 20 divisors (see below), whose sum is σ = 3543190756. Its totient is φ = 783747072.

The previous prime is 1698118847. The next prime is 1698118897. The reversal of 1698118864 is 4688118961.

It can be written as a sum of positive squares in 2 ways, for example, as 247118400 + 1451000464 = 15720^2 + 38092^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081809 + ... + 4082224.

Almost surely, 2^1698118864 is an apocalyptic number.

It is an amenable number.

1698118864 is an abundant number, since it is smaller than the sum of its proper divisors (1845071892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1698118864 is a wasteful number, since it uses less digits than its factorization.

1698118864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164054 (or 8164048 counting only the distinct ones).

The product of its digits is 663552, while the sum is 52.

The square root of 1698118864 is about 41208.2378172132. The cubic root of 1698118864 is about 1193.0428129441.

The spelling of 1698118864 in words is "one billion, six hundred ninety-eight million, one hundred eighteen thousand, eight hundred sixty-four".