3944591675550 has 144 divisors (see below), whose sum is σ = 10643083308000. Its totient is φ = 1047406429440.

The previous prime is 3944591675513. The next prime is 3944591675551. The reversal of 3944591675550 is 555761954493.

3944591675550 is a `hidden beast` number, since 3 + 9 + 4 + 4 + 5 + 9 + 1 + 6 + 75 + 550 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944591675551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 100533336 + ... + 100572564.

It is an arithmetic number, because the mean of its divisors is an integer number (73910300750).

Almost surely, 2^{3944591675550} is an apocalyptic number.

3944591675550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3944591675550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5321541654000).

3944591675550 is an abundant number, since it is smaller than the sum of its proper divisors (6698491632450).

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

3944591675550 is a wasteful number, since it uses less digits than its factorization.

3944591675550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40195 (or 40187 counting only the distinct ones).

The product of its (nonzero) digits is 102060000, while the sum is 63.

The spelling of 3944591675550 in words is "three trillion, nine hundred forty-four billion, five hundred ninety-one million, six hundred seventy-five thousand, five hundred fifty".