78042766844 has 12 divisors (see below), whose sum is σ = 156085533744. Its totient is φ = 33446900064.

The previous prime is 78042766843. The next prime is 78042766849. The reversal of 78042766844 is 44866724087.

78042766844 is an admirable number.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78042766844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78042766843) 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, 1393620809 + ... + 1393620864.

It is an arithmetic number, because the mean of its divisors is an integer number (13007127812).

Almost surely, 2^78042766844 is an apocalyptic number.

It is an amenable number.

78042766844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78042766844 is a wasteful number, since it uses less digits than its factorization.

78042766844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787241684 (or 2787241682 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 56.

The spelling of 78042766844 in words is "seventy-eight billion, forty-two million, seven hundred sixty-six thousand, eight hundred forty-four".