12739447512 has 96 divisors (see below), whose sum is σ = 38557406160. Its totient is φ = 3766272000.

The previous prime is 12739447433. The next prime is 12739447517. The reversal of 12739447512 is 21574493721.

12739447512 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 94 + 47 + 512 = 666.

It is a super-2 number, since 2×12739447512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739447517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163689 + ... + 228632.

Almost surely, 2^12739447512 is an apocalyptic number.

12739447512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12739447512 is an abundant number, since it is smaller than the sum of its proper divisors (25817958648).

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

12739447512 is a wasteful number, since it uses less digits than its factorization.

12739447512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392385 (or 392378 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 12739447512 in words is "twelve billion, seven hundred thirty-nine million, four hundred forty-seven thousand, five hundred twelve".