44202745981 has 4 divisors (see below), whose sum is σ = 44299470172. Its totient is φ = 44106021792.

The previous prime is 44202745949. The next prime is 44202746011. The reversal of 44202745981 is 18954720244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36439373881 + 7763372100 = 190891^2 + 88110^2 .

It is a cyclic number.

It is not a de Polignac number, because 44202745981 - 2⁵ = 44202745949 is a prime.

It is a super-2 number, since 2×44202745981² (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 (44202745901) 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, 48361410 + ... + 48362323.

It is an arithmetic number, because the mean of its divisors is an integer number (11074867543).

Almost surely, 2^44202745981 is an apocalyptic number.

It is an amenable number.

44202745981 is a deficient number, since it is larger than the sum of its proper divisors (96724191).

44202745981 is an equidigital number, since it uses as much as digits as its factorization.

44202745981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96724190.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 44202745981 in words is "forty-four billion, two hundred two million, seven hundred forty-five thousand, nine hundred eighty-one".