445909793522 has 18 divisors (see below), whose sum is σ = 673596400743. Its totient is φ = 221388672384.

The previous prime is 445909793489. The next prime is 445909793531. The reversal of 445909793522 is 225397909544.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 187308049681 + 258601743841 = 432791^2 + 508529^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=472181.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 140708354 + ... + 140711522.

Almost surely, 2^445909793522 is an apocalyptic number.

445909793522 is a deficient number, since it is larger than the sum of its proper divisors (227686607221).

445909793522 is an frugal number, since it uses more digits than its factorization.

445909793522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6638 (or 3320 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 59.

The spelling of 445909793522 in words is "four hundred forty-five billion, nine hundred nine million, seven hundred ninety-three thousand, five hundred twenty-two".