4778245647 has 80 divisors (see below), whose sum is σ = 8770544640. Its totient is φ = 2531414592.

The previous prime is 4778245603. The next prime is 4778245649. The reversal of 4778245647 is 7465428774.

4778245647 is a `hidden beast` number, since 4 + 7 + 78 + 2 + 4 + 564 + 7 = 666.

It is not a de Polignac number, because 4778245647 - 2⁷ = 4778245519 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 4778245593 and 4778245602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778245649) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 501613 + ... + 511049.

It is an arithmetic number, because the mean of its divisors is an integer number (109631808).

Almost surely, 2^4778245647 is an apocalyptic number.

4778245647 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

4778245647 is a deficient number, since it is larger than the sum of its proper divisors (3992298993).

4778245647 is a wasteful number, since it uses less digits than its factorization.

4778245647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9522 (or 9513 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 54.

The square root of 4778245647 is about 69124.8554935198. The cubic root of 4778245647 is about 1684.3130915604.

The spelling of 4778245647 in words is "four billion, seven hundred seventy-eight million, two hundred forty-five thousand, six hundred forty-seven".