78504431318 has 32 divisors (see below), whose sum is σ = 120869366400. Its totient is φ = 38232001984.

The previous prime is 78504431281. The next prime is 78504431333. The reversal of 78504431318 is 81313440587.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3397721 + ... + 3420747.

It is an arithmetic number, because the mean of its divisors is an integer number (3777167700).

Almost surely, 2^78504431318 is an apocalyptic number.

78504431318 is a deficient number, since it is larger than the sum of its proper divisors (42364935082).

78504431318 is a wasteful number, since it uses less digits than its factorization.

78504431318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23404.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 78504431318 in words is "seventy-eight billion, five hundred four million, four hundred thirty-one thousand, three hundred eighteen".