78773754654648 has 24 divisors (see below), whose sum is σ = 213345585523200. Its totient is φ = 26257918218192.

The previous prime is 78773754654641. The next prime is 78773754654649. The reversal of 78773754654648 is 84645645737787.

78773754654648 is a `hidden beast` number, since 7 + 8 + 7 + 7 + 3 + 7 + 546 + 5 + 4 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78773754654641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 547039962808 + ... + 547039962951.

It is an arithmetic number, because the mean of its divisors is an integer number (8889399396800).

Almost surely, 2^{78773754654648} is an apocalyptic number.

It is an amenable number.

78773754654648 is an abundant number, since it is smaller than the sum of its proper divisors (134571830868552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78773754654648 is a wasteful number, since it uses less digits than its factorization.

78773754654648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094079925771 (or 1094079925764 counting only the distinct ones).

The product of its digits is 26553139200, while the sum is 81.

The spelling of 78773754654648 in words is "seventy-eight trillion, seven hundred seventy-three billion, seven hundred fifty-four million, six hundred fifty-four thousand, six hundred forty-eight".