78549494886 has 24 divisors (see below), whose sum is σ = 170256308040. Its totient is φ = 26173051776.

The previous prime is 78549494869. The next prime is 78549494887. The reversal of 78549494886 is 68849494587.

78549494886 is a `hidden beast` number, since 7 + 8 + 54 + 9 + 494 + 8 + 86 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78549494887) 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 11 ways as a sum of consecutive naturals, for example, 794796 + ... + 888143.

It is an arithmetic number, because the mean of its divisors is an integer number (7094012835).

Almost surely, 2^78549494886 is an apocalyptic number.

78549494886 is an abundant number, since it is smaller than the sum of its proper divisors (91706813154).

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

78549494886 is a wasteful number, since it uses less digits than its factorization.

78549494886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685540 (or 1685537 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 72.

The spelling of 78549494886 in words is "seventy-eight billion, five hundred forty-nine million, four hundred ninety-four thousand, eight hundred eighty-six".