12565570001 has 2 divisors, whose sum is σ = 12565570002. Its totient is φ = 12565570000.

The previous prime is 12565569979. The next prime is 12565570027. The reversal of 12565570001 is 10007556521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7283769025 + 5281800976 = 85345^2 + 72676^2 .

It is an emirp because it is prime and its reverse (10007556521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12565570001 is a prime.

It is a super-2 number, since 2×12565570001² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12565570001.

It is not a weakly prime, because it can be changed into another prime (12565570201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282785000 + 6282785001.

It is an arithmetic number, because the mean of its divisors is an integer number (6282785001).

Almost surely, 2^12565570001 is an apocalyptic number.

It is an amenable number.

12565570001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565570001 is an equidigital number, since it uses as much as digits as its factorization.

12565570001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 12565570001 in words is "twelve billion, five hundred sixty-five million, five hundred seventy thousand, one".