12784511712 has 48 divisors (see below), whose sum is σ = 38353537152. Its totient is φ = 3652717440.

The previous prime is 12784511599. The next prime is 12784511713. The reversal of 12784511712 is 21711548721.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12784511713) 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, 9511614 + ... + 9512957.

It is an arithmetic number, because the mean of its divisors is an integer number (799032024).

Almost surely, 2^12784511712 is an apocalyptic number.

12784511712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12784511712 is an abundant number, since it is smaller than the sum of its proper divisors (25569025440).

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

12784511712 is a wasteful number, since it uses less digits than its factorization.

12784511712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19024591 (or 19024583 counting only the distinct ones).

The product of its digits is 31360, while the sum is 39.

The spelling of 12784511712 in words is "twelve billion, seven hundred eighty-four million, five hundred eleven thousand, seven hundred twelve".