445455452124221 has 128 divisors (see below), whose sum is σ = 599885383974912. Its totient is φ = 320528001024000.

The previous prime is 445455452123977. The next prime is 445455452124229. The reversal of 445455452124221 is 122421254554544.

It is not a de Polignac number, because 445455452124221 - 2¹⁰ = 445455452123197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445455452124221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445455452124229) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5062467536 + ... + 5062555526.

It is an arithmetic number, because the mean of its divisors is an integer number (4686604562304).

Almost surely, 2^{445455452124221} is an apocalyptic number.

445455452124221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

445455452124221 is a deficient number, since it is larger than the sum of its proper divisors (154429931850691).

445455452124221 is a wasteful number, since it uses less digits than its factorization.

445455452124221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88803.

The product of its digits is 10240000, while the sum is 50.

The spelling of 445455452124221 in words is "four hundred forty-five trillion, four hundred fifty-five billion, four hundred fifty-two million, one hundred twenty-four thousand, two hundred twenty-one".