6998537594 has 16 divisors (see below), whose sum is σ = 11267593128. Its totient is φ = 3248312832.

The previous prime is 6998537591. The next prime is 6998537597. The reversal of 6998537594 is 4957358996.

It is an interprime number because it is at equal distance from previous prime (6998537591) and next prime (6998537597).

It can be written as a sum of positive squares in 4 ways, for example, as 6807075025 + 191462569 = 82505^2 + 13837^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6998537594.

It is not an unprimeable number, because it can be changed into a prime (6998537591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1407377 + ... + 1412340.

Almost surely, 2^6998537594 is an apocalyptic number.

6998537594 is a deficient number, since it is larger than the sum of its proper divisors (4269055534).

6998537594 is a wasteful number, since it uses less digits than its factorization.

6998537594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819809.

The product of its digits is 73483200, while the sum is 65.

The square root of 6998537594 is about 83657.2626494556. The cubic root of 6998537594 is about 1912.7979600641.

The spelling of 6998537594 in words is "six billion, nine hundred ninety-eight million, five hundred thirty-seven thousand, five hundred ninety-four".