44081221632 has 312 divisors, whose sum is σ = 137825042400. Its totient is φ = 12493651968.

The previous prime is 44081221607. The next prime is 44081221673. The reversal of 44081221632 is 23612218044.

It is a junction number, because it is equal to n+sod(n) for n = 44081221593 and 44081221602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107777844 + ... + 107778252.

Almost surely, 2^44081221632 is an apocalyptic number.

44081221632 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44081221632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68912521200).

44081221632 is an abundant number, since it is smaller than the sum of its proper divisors (93743820768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

44081221632 is a wasteful number, since it uses less digits than its factorization.

44081221632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

Adding to 44081221632 its reverse (23612218044), we get a palindrome (67693439676).

The spelling of 44081221632 in words is "forty-four billion, eighty-one million, two hundred twenty-one thousand, six hundred thirty-two".