77930247918 has 16 divisors (see below), whose sum is σ = 157317137280. Its totient is φ = 25733975736.

The previous prime is 77930247851. The next prime is 77930247919. The reversal of 77930247918 is 81974203977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77930247919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60692698 + ... + 60693981.

It is an arithmetic number, because the mean of its divisors is an integer number (9832321080).

Almost surely, 2^77930247918 is an apocalyptic number.

77930247918 is an abundant number, since it is smaller than the sum of its proper divisors (79386889362).

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

77930247918 is a wasteful number, since it uses less digits than its factorization.

77930247918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121386791.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The spelling of 77930247918 in words is "seventy-seven billion, nine hundred thirty million, two hundred forty-seven thousand, nine hundred eighteen".