77884430112 has 36 divisors (see below), whose sum is σ = 221483848950. Its totient is φ = 25961476608.

The previous prime is 77884430081. The next prime is 77884430171. The reversal of 77884430112 is 21103448877.

It can be written as a sum of positive squares in only one way, i.e., 73986176016 + 3898254096 = 272004^2 + 62436^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135215737 + ... + 135216312.

Almost surely, 2^77884430112 is an apocalyptic number.

77884430112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77884430112 is an abundant number, since it is smaller than the sum of its proper divisors (143599418838).

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

77884430112 is a wasteful number, since it uses less digits than its factorization.

77884430112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270432065 (or 270432054 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

Adding to 77884430112 its reverse (21103448877), we get a palindrome (98987878989).

The spelling of 77884430112 in words is "seventy-seven billion, eight hundred eighty-four million, four hundred thirty thousand, one hundred twelve".