12780528601 has 3 divisors (see below), whose sum is σ = 12780641653. Its totient is φ = 12780415550.

The previous prime is 12780528589. The next prime is 12780528647. The reversal of 12780528601 is 10682508721.

The square root of 12780528601 is 113051.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10682508721 = 61007 ⋅175103.

It is not a de Polignac number, because 12780528601 - 2¹⁹ = 12780004313 is a prime.

It is a super-2 number, since 2×12780528601² (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 (12780528661) 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, 56526 + ... + 169576.

Almost surely, 2^12780528601 is an apocalyptic number.

12780528601 is the 113051-st square number.

12780528601 is the 56526-th centered octagonal number.

It is an amenable number.

12780528601 is a deficient number, since it is larger than the sum of its proper divisors (113052).

12780528601 is an frugal number, since it uses more digits than its factorization.

12780528601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226102 (or 113051 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 12780528601 in words is "twelve billion, seven hundred eighty million, five hundred twenty-eight thousand, six hundred one".