778125521877 has 12 divisors (see below), whose sum is σ = 1140393327360. Its totient is φ = 471591225160.

The previous prime is 778125521861. The next prime is 778125521879.

778125521877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 778125521877 - 2⁴ = 778125521861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 778125521877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778125521879) 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 11 ways as a sum of consecutive naturals, for example, 1071797877 + ... + 1071798602.

It is an arithmetic number, because the mean of its divisors is an integer number (95032777280).

Almost surely, 2^778125521877 is an apocalyptic number.

It is an amenable number.

778125521877 is a deficient number, since it is larger than the sum of its proper divisors (362267805483).

778125521877 is a wasteful number, since it uses less digits than its factorization.

778125521877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143596504 (or 2143596493 counting only the distinct ones).

The product of its digits is 15366400, while the sum is 60.

The spelling of 778125521877 in words is "seven hundred seventy-eight billion, one hundred twenty-five million, five hundred twenty-one thousand, eight hundred seventy-seven".