45591864161 has 4 divisors (see below), whose sum is σ = 46561903872. Its totient is φ = 44621824452.

The previous prime is 45591864119. The next prime is 45591864179. The reversal of 45591864161 is 16146819554.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16146819554 = 2 ⋅8073409777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45591864161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45591864191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485019785 + ... + 485019878.

It is an arithmetic number, because the mean of its divisors is an integer number (11640475968).

Almost surely, 2^45591864161 is an apocalyptic number.

It is an amenable number.

45591864161 is a deficient number, since it is larger than the sum of its proper divisors (970039711).

45591864161 is an equidigital number, since it uses as much as digits as its factorization.

45591864161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970039710.

The product of its digits is 1036800, while the sum is 50.

The spelling of 45591864161 in words is "forty-five billion, five hundred ninety-one million, eight hundred sixty-four thousand, one hundred sixty-one".