7768779280 has 40 divisors (see below), whose sum is σ = 19013068800. Its totient is φ = 2943957888.

The previous prime is 7768779233. The next prime is 7768779287. The reversal of 7768779280 is 829778677.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (7768779287) 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, 2554000 + ... + 2557039.

It is an arithmetic number, because the mean of its divisors is an integer number (475326720).

Almost surely, 2^7768779280 is an apocalyptic number.

It is an amenable number.

7768779280 is an abundant number, since it is smaller than the sum of its proper divisors (11244289520).

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

7768779280 is a wasteful number, since it uses less digits than its factorization.

7768779280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111071 (or 5111065 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 61.

The square root of 7768779280 is about 88140.6789172854. The cubic root of 7768779280 is about 1980.5429317482.

The spelling of 7768779280 in words is "seven billion, seven hundred sixty-eight million, seven hundred seventy-nine thousand, two hundred eighty".