6849581637 has 4 divisors (see below), whose sum is σ = 9132775520. Its totient is φ = 4566387756.

The previous prime is 6849581611. The next prime is 6849581797. The reversal of 6849581637 is 7361859486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6849581637 - 2⁶ = 6849581573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6849511637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141596937 + ... + 1141596942.

It is an arithmetic number, because the mean of its divisors is an integer number (2283193880).

Almost surely, 2^6849581637 is an apocalyptic number.

It is an amenable number.

6849581637 is a deficient number, since it is larger than the sum of its proper divisors (2283193883).

6849581637 is a wasteful number, since it uses less digits than its factorization.

6849581637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283193882.

The product of its digits is 8709120, while the sum is 57.

The square root of 6849581637 is about 82762.1993243292. The cubic root of 6849581637 is about 1899.1299467036.

The spelling of 6849581637 in words is "six billion, eight hundred forty-nine million, five hundred eighty-one thousand, six hundred thirty-seven".