778788887877 has 192 divisors, whose sum is σ = 1582889817600. Its totient is φ = 363344486400.

The previous prime is 778788887857. The next prime is 778788887879.

778788887877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 778788887877 - 2¹⁹ = 778788363589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778788887879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16309477 + ... + 16357157.

It is an arithmetic number, because the mean of its divisors is an integer number (8244217800).

Almost surely, 2^778788887877 is an apocalyptic number.

778788887877 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

778788887877 is an abundant number, since it is smaller than the sum of its proper divisors (804100929723).

778788887877 is a wasteful number, since it uses less digits than its factorization.

778788887877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47769 (or 47752 counting only the distinct ones).

The product of its digits is 30840979456, while the sum is 90.

The spelling of 778788887877 in words is "seven hundred seventy-eight billion, seven hundred eighty-eight million, eight hundred eighty-seven thousand, eight hundred seventy-seven".