44542164181 has 2 divisors, whose sum is σ = 44542164182. Its totient is φ = 44542164180.

The previous prime is 44542164179. The next prime is 44542164241. The reversal of 44542164181 is 18146124544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40234342225 + 4307821956 = 200585^2 + 65634^2 .

It is a cyclic number.

It is not a de Polignac number, because 44542164181 - 2¹ = 44542164179 is a prime.

It is a super-2 number, since 2×44542164181² (a number of 22 digits) contains 22 as substring.

Together with 44542164179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44542164881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22271082090 + 22271082091.

It is an arithmetic number, because the mean of its divisors is an integer number (22271082091).

Almost surely, 2^44542164181 is an apocalyptic number.

It is an amenable number.

44542164181 is a deficient number, since it is larger than the sum of its proper divisors (1).

44542164181 is an equidigital number, since it uses as much as digits as its factorization.

44542164181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 40.

The spelling of 44542164181 in words is "forty-four billion, five hundred forty-two million, one hundred sixty-four thousand, one hundred eighty-one".