12575004661 has 2 divisors, whose sum is σ = 12575004662. Its totient is φ = 12575004660.

The previous prime is 12575004649. The next prime is 12575004683. The reversal of 12575004661 is 16640057521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12386354436 + 188650225 = 111294^2 + 13735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12575004661 - 2¹⁷ = 12574873589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12575004661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12575004461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6287502330 + 6287502331.

It is an arithmetic number, because the mean of its divisors is an integer number (6287502331).

Almost surely, 2^12575004661 is an apocalyptic number.

It is an amenable number.

12575004661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12575004661 is an equidigital number, since it uses as much as digits as its factorization.

12575004661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 12575004661 in words is "twelve billion, five hundred seventy-five million, four thousand, six hundred sixty-one".