78559201780 has 24 divisors (see below), whose sum is σ = 165000729600. Its totient is φ = 31418651040.

The previous prime is 78559201757. The next prime is 78559201793. The reversal of 78559201780 is 8710295587.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 184980 + ... + 437419.

It is an arithmetic number, because the mean of its divisors is an integer number (6875030400).

Almost surely, 2^78559201780 is an apocalyptic number.

It is an amenable number.

78559201780 is an abundant number, since it is smaller than the sum of its proper divisors (86441527820).

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

78559201780 is a wasteful number, since it uses less digits than its factorization.

78559201780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628719 (or 628717 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 78559201780 in words is "seventy-eight billion, five hundred fifty-nine million, two hundred one thousand, seven hundred eighty".