44621390380544 has 160 divisors (see below), whose sum is σ = 95987226424320. Its totient is φ = 20672949952512.

The previous prime is 44621390380517. The next prime is 44621390380549. The reversal of 44621390380544 is 44508309312644.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44621390380549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48853619 + ... + 49758605.

It is an arithmetic number, because the mean of its divisors is an integer number (599920165152).

Almost surely, 2^{44621390380544} 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 44621390380544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47993613212160).

44621390380544 is an abundant number, since it is smaller than the sum of its proper divisors (51365836043776).

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

44621390380544 is an equidigital number, since it uses as much as digits as its factorization.

44621390380544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905160 (or 905144 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 44621390380544 in words is "forty-four trillion, six hundred twenty-one billion, three hundred ninety million, three hundred eighty thousand, five hundred forty-four".