4851721751 has 2 divisors, whose sum is σ = 4851721752. Its totient is φ = 4851721750.

The previous prime is 4851721733. The next prime is 4851721753. The reversal of 4851721751 is 1571271584.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4851721751 is a prime.

Together with 4851721753, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4851721699 and 4851721708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4851721753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2425860875 + 2425860876.

It is an arithmetic number, because the mean of its divisors is an integer number (2425860876).

Almost surely, 2^4851721751 is an apocalyptic number.

4851721751 is a deficient number, since it is larger than the sum of its proper divisors (1).

4851721751 is an equidigital number, since it uses as much as digits as its factorization.

4851721751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78400, while the sum is 41.

The square root of 4851721751 is about 69654.3017408114. The cubic root of 4851721751 is about 1692.9025608939.

The spelling of 4851721751 in words is "four billion, eight hundred fifty-one million, seven hundred twenty-one thousand, seven hundred fifty-one".