44538721632 has 144 divisors (see below), whose sum is σ = 131167003968. Its totient is φ = 14325937920.

The previous prime is 44538721631. The next prime is 44538721639. The reversal of 44538721632 is 23612783544.

44538721632 is a `hidden beast` number, since 4 + 4 + 5 + 3 + 8 + 7 + 2 + 1 + 632 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×44538721632² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44538721631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006207 + ... + 1049537.

It is an arithmetic number, because the mean of its divisors is an integer number (910881972).

Almost surely, 2^44538721632 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 44538721632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65583501984).

44538721632 is an abundant number, since it is smaller than the sum of its proper divisors (86628282336).

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

44538721632 is a wasteful number, since it uses less digits than its factorization.

44538721632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43473 (or 43462 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 44538721632 in words is "forty-four billion, five hundred thirty-eight million, seven hundred twenty-one thousand, six hundred thirty-two".