77365925760 has 128 divisors (see below), whose sum is σ = 247337719200. Its totient is φ = 20569522176.

The previous prime is 77365925717. The next prime is 77365925761. The reversal of 77365925760 is 6752956377.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 77365925760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77365925761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587256 + ... + 706824.

Almost surely, 2^77365925760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77365925760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123668859600).

77365925760 is an abundant number, since it is smaller than the sum of its proper divisors (169971793440).

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

77365925760 is a wasteful number, since it uses less digits than its factorization.

77365925760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119928 (or 119916 counting only the distinct ones).

The product of its (nonzero) digits is 16669800, while the sum is 57.

The spelling of 77365925760 in words is "seventy-seven billion, three hundred sixty-five million, nine hundred twenty-five thousand, seven hundred sixty".