12415615545161 has 2 divisors, whose sum is σ = 12415615545162. Its totient is φ = 12415615545160.

The previous prime is 12415615545143. The next prime is 12415615545239. The reversal of 12415615545161 is 16154551651421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11761854357136 + 653761188025 = 3429556^2 + 808555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12415615545161 is a prime.

It is not a weakly prime, because it can be changed into another prime (12415615545131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6207807772580 + 6207807772581.

It is an arithmetic number, because the mean of its divisors is an integer number (6207807772581).

Almost surely, 2^{12415615545161} is an apocalyptic number.

It is an amenable number.

12415615545161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12415615545161 is an equidigital number, since it uses as much as digits as its factorization.

12415615545161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720000, while the sum is 47.

The spelling of 12415615545161 in words is "twelve trillion, four hundred fifteen billion, six hundred fifteen million, five hundred forty-five thousand, one hundred sixty-one".