12532578601 has 3 divisors (see below), whose sum is σ = 12532690551. Its totient is φ = 12532466652.

The previous prime is 12532578593. The next prime is 12532578647. The reversal of 12532578601 is 10687523521.

The square root of 12532578601 is 111949.

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: 10687523521 = 56431 ⋅189391.

It can be written as a sum of positive squares in only one way, i.e., 37810201 + 12494768400 = 6149^2 + 111780^2 .

It is not a de Polignac number, because 12532578601 - 2³ = 12532578593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12532578901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55975 + ... + 167923.

It is an arithmetic number, because the mean of its divisors is an integer number (4177563517).

Almost surely, 2^12532578601 is an apocalyptic number.

12532578601 is the 111949-th square number.

12532578601 is the 55975-th centered octagonal number.

It is an amenable number.

12532578601 is a deficient number, since it is larger than the sum of its proper divisors (111950).

12532578601 is an frugal number, since it uses more digits than its factorization.

12532578601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223898 (or 111949 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 12532578601 in words is "twelve billion, five hundred thirty-two million, five hundred seventy-eight thousand, six hundred one".