4978786878794 has 4 divisors (see below), whose sum is σ = 7468180318194. Its totient is φ = 2489393439396.

The previous prime is 4978786878773. The next prime is 4978786878799.

4978786878794 is nontrivially palindromic in base 10.

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., 4961333034025 + 17453844769 = 2227405^2 + 132113^2 .

It is not an unprimeable number, because it can be changed into a prime (4978786878799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244696719697 + ... + 1244696719700.

Almost surely, 2^{4978786878794} is an apocalyptic number.

4978786878794 is a deficient number, since it is larger than the sum of its proper divisors (2489393439400).

4978786878794 is a wasteful number, since it uses less digits than its factorization.

4978786878794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489393439399.

The product of its digits is 76473040896, while the sum is 92.

The spelling of 4978786878794 in words is "four trillion, nine hundred seventy-eight billion, seven hundred eighty-six million, eight hundred seventy-eight thousand, seven hundred ninety-four".