4779889861 has 2 divisors, whose sum is σ = 4779889862. Its totient is φ = 4779889860.

The previous prime is 4779889837. The next prime is 4779889967. The reversal of 4779889861 is 1689889774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4625360100 + 154529761 = 68010^2 + 12431^2 .

It is a cyclic number.

It is not a de Polignac number, because 4779889861 - 2²⁷ = 4645672133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4779889061) 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, 2389944930 + 2389944931.

It is an arithmetic number, because the mean of its divisors is an integer number (2389944931).

Almost surely, 2^4779889861 is an apocalyptic number.

It is an amenable number.

4779889861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4779889861 is an equidigital number, since it uses as much as digits as its factorization.

4779889861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 67.

The square root of 4779889861 is about 69136.7475442691. The cubic root of 4779889861 is about 1684.5062624283.

The spelling of 4779889861 in words is "four billion, seven hundred seventy-nine million, eight hundred eighty-nine thousand, eight hundred sixty-one".