78307555328 has 48 divisors (see below), whose sum is σ = 165787352640. Its totient is φ = 36850597888.

The previous prime is 78307555289. The next prime is 78307555331. The reversal of 78307555328 is 82355570387.

It is a super-2 number, since 2×78307555328² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78307555328.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1089776 + ... + 1159407.

It is an arithmetic number, because the mean of its divisors is an integer number (3453903180).

Almost surely, 2^78307555328 is an apocalyptic number.

It is an amenable number.

78307555328 is an abundant number, since it is smaller than the sum of its proper divisors (87479797312).

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

78307555328 is a wasteful number, since it uses less digits than its factorization.

78307555328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249222 (or 2249202 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 53.

The spelling of 78307555328 in words is "seventy-eight billion, three hundred seven million, five hundred fifty-five thousand, three hundred twenty-eight".