78424864684 has 24 divisors (see below), whose sum is σ = 140248075968. Its totient is φ = 38358378240.

The previous prime is 78424864673. The next prime is 78424864703. The reversal of 78424864684 is 48646842487.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477412 + ... + 620299.

It is an arithmetic number, because the mean of its divisors is an integer number (5843669832).

Almost surely, 2^78424864684 is an apocalyptic number.

It is an amenable number.

78424864684 is a deficient number, since it is larger than the sum of its proper divisors (61823211284).

78424864684 is a wasteful number, since it uses less digits than its factorization.

78424864684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098105 (or 1098103 counting only the distinct ones).

The product of its digits is 66060288, while the sum is 61.

The spelling of 78424864684 in words is "seventy-eight billion, four hundred twenty-four million, eight hundred sixty-four thousand, six hundred eighty-four".