78474400774844 has 24 divisors (see below), whose sum is σ = 137815751919888. Its totient is φ = 39098627448320.

The previous prime is 78474400774811. The next prime is 78474400774949. The reversal of 78474400774844 is 44847700447487.

78474400774844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17458367 + ... + 21488214.

It is an arithmetic number, because the mean of its divisors is an integer number (5742322996662).

Almost surely, 2^{78474400774844} is an apocalyptic number.

It is an amenable number.

78474400774844 is a deficient number, since it is larger than the sum of its proper divisors (59341351145044).

78474400774844 is a wasteful number, since it uses less digits than its factorization.

78474400774844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38948365 (or 38948363 counting only the distinct ones).

The product of its (nonzero) digits is 629407744, while the sum is 68.

The spelling of 78474400774844 in words is "seventy-eight trillion, four hundred seventy-four billion, four hundred million, seven hundred seventy-four thousand, eight hundred forty-four".