4778521722 has 128 divisors (see below), whose sum is σ = 12319211520. Its totient is φ = 1360877760.

The previous prime is 4778521637. The next prime is 4778521757. The reversal of 4778521722 is 2271258774.

4778521722 is a `hidden beast` number, since 477 + 8 + 5 + 2 + 172 + 2 = 666.

It is an unprimeable number.

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 in 63 ways as a sum of consecutive naturals, for example, 495753 + ... + 505299.

It is an arithmetic number, because the mean of its divisors is an integer number (96243840).

Almost surely, 2^4778521722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4778521722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6159605760).

4778521722 is an abundant number, since it is smaller than the sum of its proper divisors (7540689798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4778521722 is a wasteful number, since it uses less digits than its factorization.

4778521722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625 (or 9619 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

The square root of 4778521722 is about 69126.8523947098. The cubic root of 4778521722 is about 1684.3455293919.

The spelling of 4778521722 in words is "four billion, seven hundred seventy-eight million, five hundred twenty-one thousand, seven hundred twenty-two".