45815666161 has 2 divisors, whose sum is σ = 45815666162. Its totient is φ = 45815666160.

The previous prime is 45815666147. The next prime is 45815666189. The reversal of 45815666161 is 16166651854.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39245591025 + 6570075136 = 198105^2 + 81056^2 .

It is a cyclic number.

It is not a de Polignac number, because 45815666161 - 2¹¹ = 45815664113 is a prime.

It is not a weakly prime, because it can be changed into another prime (45815666761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22907833080 + 22907833081.

It is an arithmetic number, because the mean of its divisors is an integer number (22907833081).

Almost surely, 2^45815666161 is an apocalyptic number.

It is an amenable number.

45815666161 is a deficient number, since it is larger than the sum of its proper divisors (1).

45815666161 is an equidigital number, since it uses as much as digits as its factorization.

45815666161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 49.

The spelling of 45815666161 in words is "forty-five billion, eight hundred fifteen million, six hundred sixty-six thousand, one hundred sixty-one".