4968217781 has 2 divisors, whose sum is σ = 4968217782. Its totient is φ = 4968217780.

The previous prime is 4968217747. The next prime is 4968217783. The reversal of 4968217781 is 1877128694.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2954900881 + 2013316900 = 54359^2 + 44870^2 .

It is a cyclic number.

It is not a de Polignac number, because 4968217781 - 2²⁶ = 4901108917 is a prime.

It is a super-2 number, since 2×4968217781² = 49366375838889127922, which contains 22 as substring.

Together with 4968217783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4968217783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2484108890 + 2484108891.

It is an arithmetic number, because the mean of its divisors is an integer number (2484108891).

Almost surely, 2^4968217781 is an apocalyptic number.

It is an amenable number.

4968217781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4968217781 is an equidigital number, since it uses as much as digits as its factorization.

4968217781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 53.

The square root of 4968217781 is about 70485.5856257150. The cubic root of 4968217781 is about 1706.3451207268.

The spelling of 4968217781 in words is "four billion, nine hundred sixty-eight million, two hundred seventeen thousand, seven hundred eighty-one".