4778684039 has 4 divisors (see below), whose sum is σ = 4845989520. Its totient is φ = 4711378560.

The previous prime is 4778684011. The next prime is 4778684047. The reversal of 4778684039 is 9304868774.

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

It is a cyclic number.

It is not a de Polignac number, because 4778684039 - 2²⁴ = 4761906823 is a prime.

It is a super-2 number, since 2×4778684039² = 45671642289186707042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778674039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33652634 + ... + 33652775.

It is an arithmetic number, because the mean of its divisors is an integer number (1211497380).

Almost surely, 2^4778684039 is an apocalyptic number.

4778684039 is a deficient number, since it is larger than the sum of its proper divisors (67305481).

4778684039 is an equidigital number, since it uses as much as digits as its factorization.

4778684039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67305480.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The square root of 4778684039 is about 69128.0264364606. The cubic root of 4778684039 is about 1684.3646004794.

The spelling of 4778684039 in words is "four billion, seven hundred seventy-eight million, six hundred eighty-four thousand, thirty-nine".