6897841641 has 12 divisors (see below), whose sum is σ = 10021144068. Its totient is φ = 4571978784.

The previous prime is 6897841627. The next prime is 6897841649. The reversal of 6897841641 is 1461487986.

It can be written as a sum of positive squares in 2 ways, for example, as 2633229225 + 4264612416 = 51315^2 + 65304^2 .

It is not a de Polignac number, because 6897841641 - 2⁵ = 6897841609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6897841649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2213550 + ... + 2216663.

It is an arithmetic number, because the mean of its divisors is an integer number (835095339).

Almost surely, 2^6897841641 is an apocalyptic number.

It is an amenable number.

6897841641 is a deficient number, since it is larger than the sum of its proper divisors (3123302427).

6897841641 is a wasteful number, since it uses less digits than its factorization.

6897841641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430392 (or 4430389 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 6897841641 is about 83053.2458185711. The cubic root of 6897841641 is about 1903.5797370617.

The spelling of 6897841641 in words is "six billion, eight hundred ninety-seven million, eight hundred forty-one thousand, six hundred forty-one".