6445555446 has 32 divisors (see below), whose sum is σ = 14069260800. Its totient is φ = 1952333280.

The previous prime is 6445555393. The next prime is 6445555453.

It is a happy number.

6445555446 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6445555395 and 6445555404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137235 + ... + 178113.

It is an arithmetic number, because the mean of its divisors is an integer number (439664400).

Almost surely, 2^6445555446 is an apocalyptic number.

6445555446 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6445555446 is an abundant number, since it is smaller than the sum of its proper divisors (7623705354).

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

6445555446 is a wasteful number, since it uses less digits than its factorization.

6445555446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43284.

The product of its digits is 5760000, while the sum is 48.

The square root of 6445555446 is about 80284.2166680351. The cubic root of 6445555446 is about 1861.0303234830.

The spelling of 6445555446 in words is "six billion, four hundred forty-five million, five hundred fifty-five thousand, four hundred forty-six".