12532502561 has 8 divisors (see below), whose sum is σ = 13270730760. Its totient is φ = 11794387968.

The previous prime is 12532502557. The next prime is 12532502573. The reversal of 12532502561 is 16520523521.

It can be written as a sum of positive squares in 4 ways, for example, as 414896161 + 12117606400 = 20369^2 + 110080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12532502561 - 2² = 12532502557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12532502551) 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, 323165 + ... + 359861.

It is an arithmetic number, because the mean of its divisors is an integer number (1658841345).

Almost surely, 2^12532502561 is an apocalyptic number.

It is an amenable number.

12532502561 is a deficient number, since it is larger than the sum of its proper divisors (738228199).

12532502561 is a wasteful number, since it uses less digits than its factorization.

12532502561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56803.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 12532502561 in words is "twelve billion, five hundred thirty-two million, five hundred two thousand, five hundred sixty-one".