4778700939861 has 4 divisors (see below), whose sum is σ = 6371601253152. Its totient is φ = 3185800626572.

The previous prime is 4778700939799. The next prime is 4778700939907. The reversal of 4778700939861 is 1689390078774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4778700939861 - 2¹⁸ = 4778700677717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778700959861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796450156641 + ... + 796450156646.

It is an arithmetic number, because the mean of its divisors is an integer number (1592900313288).

Almost surely, 2^{4778700939861} is an apocalyptic number.

It is an amenable number.

4778700939861 is a deficient number, since it is larger than the sum of its proper divisors (1592900313291).

4778700939861 is a wasteful number, since it uses less digits than its factorization.

4778700939861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592900313290.

The product of its (nonzero) digits is 128024064, while the sum is 69.

The spelling of 4778700939861 in words is "four trillion, seven hundred seventy-eight billion, seven hundred million, nine hundred thirty-nine thousand, eight hundred sixty-one".