6312981641 has 2 divisors, whose sum is σ = 6312981642. Its totient is φ = 6312981640.

The previous prime is 6312981617. The next prime is 6312981643. The reversal of 6312981641 is 1461892136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6235471225 + 77510416 = 78965^2 + 8804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6312981641 is a prime.

It is a Sophie Germain prime.

Together with 6312981643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6312981643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3156490820 + 3156490821.

It is an arithmetic number, because the mean of its divisors is an integer number (3156490821).

Almost surely, 2^6312981641 is an apocalyptic number.

It is an amenable number.

6312981641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6312981641 is an equidigital number, since it uses as much as digits as its factorization.

6312981641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 6312981641 is about 79454.2739001496. The cubic root of 6312981641 is about 1848.1824507095.

The spelling of 6312981641 in words is "six billion, three hundred twelve million, nine hundred eighty-one thousand, six hundred forty-one".