77115567380 has 12 divisors (see below), whose sum is σ = 161942691540. Its totient is φ = 30846226944.

The previous prime is 77115567313. The next prime is 77115567383. The reversal of 77115567380 is 8376551177.

It can be written as a sum of positive squares in 2 ways, for example, as 33819945604 + 43295621776 = 183902^2 + 208076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77115567383) 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 3 ways as a sum of consecutive naturals, for example, 1927889165 + ... + 1927889204.

It is an arithmetic number, because the mean of its divisors is an integer number (13495224295).

Almost surely, 2^77115567380 is an apocalyptic number.

It is an amenable number.

77115567380 is an abundant number, since it is smaller than the sum of its proper divisors (84827124160).

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

77115567380 is a wasteful number, since it uses less digits than its factorization.

77115567380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855778378 (or 3855778376 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 50.

The spelling of 77115567380 in words is "seventy-seven billion, one hundred fifteen million, five hundred sixty-seven thousand, three hundred eighty".