44066722181 has 4 divisors (see below), whose sum is σ = 44130495264. Its totient is φ = 44002949100.

The previous prime is 44066722169. The next prime is 44066722213. The reversal of 44066722181 is 18122766044.

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.

It is not a de Polignac number, because 44066722181 - 2¹⁸ = 44066460037 is a prime.

It is a super-2 number, since 2×44066722181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44066722081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31885505 + ... + 31886886.

It is an arithmetic number, because the mean of its divisors is an integer number (11032623816).

Almost surely, 2^44066722181 is an apocalyptic number.

It is an amenable number.

44066722181 is a deficient number, since it is larger than the sum of its proper divisors (63773083).

44066722181 is an equidigital number, since it uses as much as digits as its factorization.

44066722181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63773082.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 44066722181 in words is "forty-four billion, sixty-six million, seven hundred twenty-two thousand, one hundred eighty-one".