6998389644 has 24 divisors (see below), whose sum is σ = 16331274288. Its totient is φ = 2332553920.

The previous prime is 6998389637. The next prime is 6998389667. The reversal of 6998389644 is 4469838996.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119434 + ... + 168110.

It is an arithmetic number, because the mean of its divisors is an integer number (680469762).

Almost surely, 2^6998389644 is an apocalyptic number.

It is an amenable number.

6998389644 is an abundant number, since it is smaller than the sum of its proper divisors (9332884644).

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

6998389644 is a wasteful number, since it uses less digits than its factorization.

6998389644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60665 (or 60663 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 66.

The square root of 6998389644 is about 83656.3783820457. The cubic root of 6998389644 is about 1912.7844810361.

The spelling of 6998389644 in words is "six billion, nine hundred ninety-eight million, three hundred eighty-nine thousand, six hundred forty-four".