44073621816 has 256 divisors, whose sum is σ = 134096977920. Its totient is φ = 11803968000.

The previous prime is 44073621773. The next prime is 44073621841. The reversal of 44073621816 is 61812637044.

It is a super-2 number, since 2×44073621816² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63782031 + ... + 63782721.

It is an arithmetic number, because the mean of its divisors is an integer number (523816320).

Almost surely, 2^44073621816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44073621816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67048488960).

44073621816 is an abundant number, since it is smaller than the sum of its proper divisors (90023356104).

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

44073621816 is a wasteful number, since it uses less digits than its factorization.

44073621816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 44073621816 in words is "forty-four billion, seventy-three million, six hundred twenty-one thousand, eight hundred sixteen".