77958987822 has 48 divisors (see below), whose sum is σ = 169326847872. Its totient is φ = 25922455440.

The previous prime is 77958987791. The next prime is 77958987863. The reversal of 77958987822 is 22878985977.

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 23 ways as a sum of consecutive naturals, for example, 16616497 + ... + 16621187.

It is an arithmetic number, because the mean of its divisors is an integer number (3527642664).

Almost surely, 2^77958987822 is an apocalyptic number.

77958987822 is an abundant number, since it is smaller than the sum of its proper divisors (91367860050).

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

77958987822 is a wasteful number, since it uses less digits than its factorization.

77958987822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773 (or 6770 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 72.

The spelling of 77958987822 in words is "seventy-seven billion, nine hundred fifty-eight million, nine hundred eighty-seven thousand, eight hundred twenty-two".