77701890777 has 12 divisors (see below), whose sum is σ = 120517218576. Its totient is φ = 44401080360.

The previous prime is 77701890733. The next prime is 77701890779. The reversal of 77701890777 is 77709810777.

It is a happy number.

It is not a de Polignac number, because 77701890777 - 2⁷ = 77701890649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77701890777.

It is not an unprimeable number, because it can be changed into a prime (77701890779) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 264291999 + ... + 264292292.

It is an arithmetic number, because the mean of its divisors is an integer number (10043101548).

Almost surely, 2^77701890777 is an apocalyptic number.

It is an amenable number.

77701890777 is a deficient number, since it is larger than the sum of its proper divisors (42815327799).

77701890777 is a wasteful number, since it uses less digits than its factorization.

77701890777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528584308 (or 528584301 counting only the distinct ones).

The product of its (nonzero) digits is 8470728, while the sum is 60.

The spelling of 77701890777 in words is "seventy-seven billion, seven hundred one million, eight hundred ninety thousand, seven hundred seventy-seven".