6998985641 has 2 divisors, whose sum is σ = 6998985642. Its totient is φ = 6998985640.

The previous prime is 6998985613. The next prime is 6998985671. The reversal of 6998985641 is 1465898996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6938223616 + 60762025 = 83296^2 + 7795^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998985641 - 2⁶ = 6998985577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6998985611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499492820 + 3499492821.

It is an arithmetic number, because the mean of its divisors is an integer number (3499492821).

Almost surely, 2^6998985641 is an apocalyptic number.

It is an amenable number.

6998985641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998985641 is an equidigital number, since it uses as much as digits as its factorization.

6998985641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33592320, while the sum is 65.

The square root of 6998985641 is about 83659.9404792999. The cubic root of 6998985641 is about 1912.8387783583.

The spelling of 6998985641 in words is "six billion, nine hundred ninety-eight million, nine hundred eighty-five thousand, six hundred forty-one".