78555733836 has 24 divisors (see below), whose sum is σ = 183617738304. Its totient is φ = 26139383760.

The previous prime is 78555733819. The next prime is 78555733849. The reversal of 78555733836 is 63833755587.

It is a self number, because there is not a number n which added to its sum of digits gives 78555733836.

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 7 ways as a sum of consecutive naturals, for example, 5725470 + ... + 5739173.

It is an arithmetic number, because the mean of its divisors is an integer number (7650739096).

Almost surely, 2^78555733836 is an apocalyptic number.

It is an amenable number.

78555733836 is an abundant number, since it is smaller than the sum of its proper divisors (105062004468).

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

78555733836 is a wasteful number, since it uses less digits than its factorization.

78555733836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11465221 (or 11465219 counting only the distinct ones).

The product of its digits is 63504000, while the sum is 60.

The spelling of 78555733836 in words is "seventy-eight billion, five hundred fifty-five million, seven hundred thirty-three thousand, eight hundred thirty-six".