12154336605161 has 2 divisors, whose sum is σ = 12154336605162. Its totient is φ = 12154336605160.

The previous prime is 12154336605157. The next prime is 12154336605233. The reversal of 12154336605161 is 16150663345121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8465801256025 + 3688535349136 = 2909605^2 + 1920556^2 .

It is a cyclic number.

It is not a de Polignac number, because 12154336605161 - 2² = 12154336605157 is a prime.

It is not a weakly prime, because it can be changed into another prime (12154336605101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077168302580 + 6077168302581.

It is an arithmetic number, because the mean of its divisors is an integer number (6077168302581).

Almost surely, 2^{12154336605161} is an apocalyptic number.

It is an amenable number.

12154336605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12154336605161 is an equidigital number, since it uses as much as digits as its factorization.

12154336605161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 12154336605161 in words is "twelve trillion, one hundred fifty-four billion, three hundred thirty-six million, six hundred five thousand, one hundred sixty-one".