12706730528 has 18 divisors (see below), whose sum is σ = 25017631191. Its totient is φ = 6353046432.

The previous prime is 12706730527. The next prime is 12706730539. The reversal of 12706730528 is 82503760721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6353365264 + 6353365264 = 79708^2 + 79708^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79708.

It is a super-2 number, since 2×12706730528² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12706730521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 627701 + ... + 647627.

Almost surely, 2^12706730528 is an apocalyptic number.

It is an amenable number.

12706730528 is a deficient number, since it is larger than the sum of its proper divisors (12310900663).

12706730528 is an frugal number, since it uses more digits than its factorization.

12706730528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39864 (or 19929 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 12706730528 in words is "twelve billion, seven hundred six million, seven hundred thirty thousand, five hundred twenty-eight".