4778353949 has 2 divisors, whose sum is σ = 4778353950. Its totient is φ = 4778353948.

The previous prime is 4778353883. The next prime is 4778353961. The reversal of 4778353949 is 9493538774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4626448324 + 151905625 = 68018^2 + 12325^2 .

It is a cyclic number.

It is not a de Polignac number, because 4778353949 - 2¹² = 4778349853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4778355949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2389176974 + 2389176975.

It is an arithmetic number, because the mean of its divisors is an integer number (2389176975).

Almost surely, 2^4778353949 is an apocalyptic number.

It is an amenable number.

4778353949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4778353949 is an equidigital number, since it uses as much as digits as its factorization.

4778353949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 59.

The square root of 4778353949 is about 69125.6388686571. The cubic root of 4778353949 is about 1684.3258168095.

The spelling of 4778353949 in words is "four billion, seven hundred seventy-eight million, three hundred fifty-three thousand, nine hundred forty-nine".