77409508872 has 64 divisors (see below), whose sum is σ = 194026104000. Its totient is φ = 25736286464.

The previous prime is 77409508871. The next prime is 77409508921. The reversal of 77409508872 is 27880590477.

It is not an unprimeable number, because it can be changed into a prime (77409508871) 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 15 ways as a sum of consecutive naturals, for example, 19258879 + ... + 19262897.

It is an arithmetic number, because the mean of its divisors is an integer number (3031657875).

Almost surely, 2^77409508872 is an apocalyptic number.

It is an amenable number.

77409508872 is an abundant number, since it is smaller than the sum of its proper divisors (116616595128).

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

77409508872 is a wasteful number, since it uses less digits than its factorization.

77409508872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 77409508872 in words is "seventy-seven billion, four hundred nine million, five hundred eight thousand, eight hundred seventy-two".