77240868880 has 40 divisors (see below), whose sum is σ = 205240024512. Its totient is φ = 26482583424.

The previous prime is 77240868847. The next prime is 77240868889. The reversal of 77240868880 is 8886804277.

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 (77240868889) 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, 68964502 + ... + 68965621.

Almost surely, 2^77240868880 is an apocalyptic number.

77240868880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77240868880 is an abundant number, since it is smaller than the sum of its proper divisors (127999155632).

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

77240868880 is a wasteful number, since it uses less digits than its factorization.

77240868880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137930143 (or 137930137 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 58.

The spelling of 77240868880 in words is "seventy-seven billion, two hundred forty million, eight hundred sixty-eight thousand, eight hundred eighty".