4921562861 has 2 divisors, whose sum is σ = 4921562862. Its totient is φ = 4921562860.

The previous prime is 4921562843. The next prime is 4921562869. The reversal of 4921562861 is 1682651294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4231502500 + 690060361 = 65050^2 + 26269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4921562861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4921562869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2460781430 + 2460781431.

It is an arithmetic number, because the mean of its divisors is an integer number (2460781431).

Almost surely, 2^4921562861 is an apocalyptic number.

It is an amenable number.

4921562861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4921562861 is an equidigital number, since it uses as much as digits as its factorization.

4921562861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 4921562861 is about 70153.8513625588. The cubic root of 4921562861 is about 1700.9870693285.

The spelling of 4921562861 in words is "four billion, nine hundred twenty-one million, five hundred sixty-two thousand, eight hundred sixty-one".