445051825621 has 16 divisors (see below), whose sum is σ = 488403684720. Its totient is φ = 403004759040.

The previous prime is 445051825597. The next prime is 445051825637. The reversal of 445051825621 is 126528150544.

It can be written as a sum of positive squares in 8 ways, for example, as 13067690596 + 431984135025 = 114314^2 + 657255^2 .

It is not a de Polignac number, because 445051825621 - 2¹⁵ = 445051792853 is a prime.

It is a super-2 number, since 2×445051825621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445051825661) 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, 4861015 + ... + 4951723.

It is an arithmetic number, because the mean of its divisors is an integer number (30525230295).

Almost surely, 2^445051825621 is an apocalyptic number.

It is an amenable number.

445051825621 is a deficient number, since it is larger than the sum of its proper divisors (43351859099).

445051825621 is a wasteful number, since it uses less digits than its factorization.

445051825621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97896.

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 445051825621 in words is "four hundred forty-five billion, fifty-one million, eight hundred twenty-five thousand, six hundred twenty-one".