444555400040 has 16 divisors (see below), whose sum is σ = 1000249650180. Its totient is φ = 177822160000.

The previous prime is 444555400001. The next prime is 444555400043. The reversal of 444555400040 is 40004555444.

It can be written as a sum of positive squares in 2 ways, for example, as 428341452484 + 16213947556 = 654478^2 + 127334^2 .

It is not an unprimeable number, because it can be changed into a prime (444555400043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5556942461 + ... + 5556942540.

Almost surely, 2^444555400040 is an apocalyptic number.

444555400040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444555400040 is an abundant number, since it is smaller than the sum of its proper divisors (555694250140).

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

444555400040 is a wasteful number, since it uses less digits than its factorization.

444555400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11113885012 (or 11113885008 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 444555400040 its reverse (40004555444), we get a palindrome (484559955484).

The spelling of 444555400040 in words is "four hundred forty-four billion, five hundred fifty-five million, four hundred thousand, forty".