45450042161 has 2 divisors, whose sum is σ = 45450042162. Its totient is φ = 45450042160.

The previous prime is 45450042119. The next prime is 45450042163. The reversal of 45450042161 is 16124005454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45326410000 + 123632161 = 212900^2 + 11119^2 .

It is a cyclic number.

It is not a de Polignac number, because 45450042161 - 2¹⁰ = 45450041137 is a prime.

Together with 45450042163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45450042163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725021080 + 22725021081.

It is an arithmetic number, because the mean of its divisors is an integer number (22725021081).

Almost surely, 2^45450042161 is an apocalyptic number.

It is an amenable number.

45450042161 is a deficient number, since it is larger than the sum of its proper divisors (1).

45450042161 is an equidigital number, since it uses as much as digits as its factorization.

45450042161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 45450042161 in words is "forty-five billion, four hundred fifty million, forty-two thousand, one hundred sixty-one".