4134785778 has 80 divisors (see below), whose sum is σ = 9474430680. Its totient is φ = 1347300864.

The previous prime is 4134785771. The next prime is 4134785791. The reversal of 4134785778 is 8775874314.

It can be written as a sum of positive squares in 4 ways, for example, as 2582977329 + 1551808449 = 50823^2 + 39393^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (4134785771) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2892768 + ... + 2894196.

Almost surely, 2^4134785778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4134785778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4737215340).

4134785778 is an abundant number, since it is smaller than the sum of its proper divisors (5339644902).

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

4134785778 is a wasteful number, since it uses less digits than its factorization.

4134785778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1824 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The square root of 4134785778 is about 64302.2999433146. The cubic root of 4134785778 is about 1605.0343743184.

The spelling of 4134785778 in words is "four billion, one hundred thirty-four million, seven hundred eighty-five thousand, seven hundred seventy-eight".