77782789216 has 48 divisors (see below), whose sum is σ = 167205826368. Its totient is φ = 35324150400.

The previous prime is 77782789187. The next prime is 77782789229. The reversal of 77782789216 is 61298728777.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296911 + ... + 493681.

It is an arithmetic number, because the mean of its divisors is an integer number (3483454716).

Almost surely, 2^77782789216 is an apocalyptic number.

It is an amenable number.

77782789216 is an abundant number, since it is smaller than the sum of its proper divisors (89423037152).

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

77782789216 is a wasteful number, since it uses less digits than its factorization.

77782789216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197915 (or 197907 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 64.

The spelling of 77782789216 in words is "seventy-seven billion, seven hundred eighty-two million, seven hundred eighty-nine thousand, two hundred sixteen".