6998154818 has 18 divisors (see below), whose sum is σ = 10594843371. Its totient is φ = 3466839024.

The previous prime is 6998154797. The next prime is 6998154833. The reversal of 6998154818 is 8184518996.

It can be written as a sum of positive squares in 5 ways, for example, as 1745819089 + 5252335729 = 41783^2 + 72473^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=59153.

It is a super-2 number, since 2×6998154818² = 97948341713393226248, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17627396 + ... + 17627792.

Almost surely, 2^6998154818 is an apocalyptic number.

6998154818 is a deficient number, since it is larger than the sum of its proper divisors (3596688553).

6998154818 is an frugal number, since it uses more digits than its factorization.

6998154818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 548 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 59.

The square root of 6998154818 is about 83654.9748550557. The cubic root of 6998154818 is about 1912.7630867547.

The spelling of 6998154818 in words is "six billion, nine hundred ninety-eight million, one hundred fifty-four thousand, eight hundred eighteen".