12571556659201 has 8 divisors (see below), whose sum is σ = 12713261725800. Its totient is φ = 12429861628800.

The previous prime is 12571556659187. The next prime is 12571556659223. The reversal of 12571556659201 is 10295665517521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 490364067600 + 12081192591601 = 700260^2 + 3475801^2 .

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 12571556659201 - 2²⁹ = 12571019788289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12571556659261) 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, 24651 + ... + 5014351.

It is an arithmetic number, because the mean of its divisors is an integer number (1589157715725).

Almost surely, 2^{12571556659201} is an apocalyptic number.

It is an amenable number.

12571556659201 is a deficient number, since it is larger than the sum of its proper divisors (141705066599).

12571556659201 is an equidigital number, since it uses as much as digits as its factorization.

12571556659201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018099.

The product of its (nonzero) digits is 5670000, while the sum is 55.

The spelling of 12571556659201 in words is "twelve trillion, five hundred seventy-one billion, five hundred fifty-six million, six hundred fifty-nine thousand, two hundred one".