445855979940 has 384 divisors, whose sum is σ = 1497036764160. Its totient is φ = 97018601472.

The previous prime is 445855979911. The next prime is 445855980077. The reversal of 445855979940 is 49979558544.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 537823446 + ... + 537824274.

It is an arithmetic number, because the mean of its divisors is an integer number (3898533240).

Almost surely, 2^445855979940 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 445855979940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748518382080).

445855979940 is an abundant number, since it is smaller than the sum of its proper divisors (1051180784220).

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

445855979940 is a wasteful number, since it uses less digits than its factorization.

445855979940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 326592000, while the sum is 69.

The spelling of 445855979940 in words is "four hundred forty-five billion, eight hundred fifty-five million, nine hundred seventy-nine thousand, nine hundred forty".