4781108861 has 2 divisors, whose sum is σ = 4781108862. Its totient is φ = 4781108860.

The previous prime is 4781108821. The next prime is 4781108863. The reversal of 4781108861 is 1688011874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2873603236 + 1907505625 = 53606^2 + 43675^2 .

It is a cyclic number.

It is not a de Polignac number, because 4781108861 - 2⁶ = 4781108797 is a prime.

Together with 4781108863, 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 (4781108863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390554430 + 2390554431.

It is an arithmetic number, because the mean of its divisors is an integer number (2390554431).

Almost surely, 2^4781108861 is an apocalyptic number.

It is an amenable number.

4781108861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4781108861 is an equidigital number, since it uses as much as digits as its factorization.

4781108861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 4781108861 is about 69145.5628439020. The cubic root of 4781108861 is about 1684.6494483356.

The spelling of 4781108861 in words is "four billion, seven hundred eighty-one million, one hundred eight thousand, eight hundred sixty-one".