4081167778 has 4 divisors (see below), whose sum is σ = 6121751670. Its totient is φ = 2040583888.

The previous prime is 4081167707. The next prime is 4081167791. The reversal of 4081167778 is 8777611804.

It is a happy number.

4081167778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3834457929 + 246709849 = 61923^2 + 15707^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020291943 + ... + 1020291946.

Almost surely, 2^4081167778 is an apocalyptic number.

4081167778 is a deficient number, since it is larger than the sum of its proper divisors (2040583892).

4081167778 is a wasteful number, since it uses less digits than its factorization.

4081167778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040583891.

The product of its (nonzero) digits is 526848, while the sum is 49.

The square root of 4081167778 is about 63884.0181735620. The cubic root of 4081167778 is about 1598.0663852438.

The spelling of 4081167778 in words is "four billion, eighty-one million, one hundred sixty-seven thousand, seven hundred seventy-eight".