4378772818 has 32 divisors (see below), whose sum is σ = 7686733824. Its totient is φ = 1831615632.

The previous prime is 4378772803. The next prime is 4378772819. The reversal of 4378772818 is 8182778734.

It is a super-2 number, since 2×4378772818² = 38347302783311322248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (4378772819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1616221 + ... + 1618927.

It is an arithmetic number, because the mean of its divisors is an integer number (240210432).

Almost surely, 2^4378772818 is an apocalyptic number.

4378772818 is a deficient number, since it is larger than the sum of its proper divisors (3307961006).

4378772818 is a wasteful number, since it uses less digits than its factorization.

4378772818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446.

The product of its digits is 4214784, while the sum is 55.

The square root of 4378772818 is about 66172.2964540298. The cubic root of 4378772818 is about 1636.0031586013.

The spelling of 4378772818 in words is "four billion, three hundred seventy-eight million, seven hundred seventy-two thousand, eight hundred eighteen".