45561320161 has 16 divisors (see below), whose sum is σ = 55038079360. Its totient is φ = 36843621120.

The previous prime is 45561320159. The next prime is 45561320171. The reversal of 45561320161 is 16102316554.

45561320161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 45561320161 - 2¹ = 45561320159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45561320141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678666 + ... + 742771.

It is an arithmetic number, because the mean of its divisors is an integer number (3439879960).

Almost surely, 2^45561320161 is an apocalyptic number.

It is an amenable number.

45561320161 is a deficient number, since it is larger than the sum of its proper divisors (9476759199).

45561320161 is a wasteful number, since it uses less digits than its factorization.

45561320161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421704.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 45561320161 in words is "forty-five billion, five hundred sixty-one million, three hundred twenty thousand, one hundred sixty-one".