445556689 has 8 divisors (see below), whose sum is σ = 471967560. Its totient is φ = 419168256.

The previous prime is 445556687. The next prime is 445556693. The reversal of 445556689 is 986655544.

It can be written as a sum of positive squares in 4 ways, for example, as 14288400 + 431268289 = 3780^2 + 20767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445556689 - 2¹ = 445556687 is a prime.

It is a super-2 number, since 2×445556689² = 397041526225285442, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (445556687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52657 + ... + 60529.

It is an arithmetic number, because the mean of its divisors is an integer number (58995945).

Almost surely, 2^445556689 is an apocalyptic number.

It is an amenable number.

445556689 is a deficient number, since it is larger than the sum of its proper divisors (26410871).

445556689 is a wasteful number, since it uses less digits than its factorization.

445556689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219.

The product of its digits is 5184000, while the sum is 52.

The square root of 445556689 is about 21108.2137804221. The cubic root of 445556689 is about 763.7788991559.

The spelling of 445556689 in words is "four hundred forty-five million, five hundred fifty-six thousand, six hundred eighty-nine".