1512640012561 has 2 divisors, whose sum is σ = 1512640012562. Its totient is φ = 1512640012560.

The previous prime is 1512640012531. The next prime is 1512640012643. The reversal of 1512640012561 is 1652100462151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030093054225 + 482546958336 = 1014935^2 + 694656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1512640012561 - 2¹⁵ = 1512639979793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1512640012531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756320006280 + 756320006281.

It is an arithmetic number, because the mean of its divisors is an integer number (756320006281).

Almost surely, 2^{1512640012561} is an apocalyptic number.

It is an amenable number.

1512640012561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512640012561 is an equidigital number, since it uses as much as digits as its factorization.

1512640012561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 1512640012561 in words is "one trillion, five hundred twelve billion, six hundred forty million, twelve thousand, five hundred sixty-one".