450138554447 has 4 divisors (see below), whose sum is σ = 450180543960. Its totient is φ = 450096564936.

The previous prime is 450138554443. The next prime is 450138554479. The reversal of 450138554447 is 744455831054.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 450138554447 - 2² = 450138554443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 450138554395 and 450138554404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450138554443) 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, 20978672 + ... + 21000117.

It is an arithmetic number, because the mean of its divisors is an integer number (112545135990).

Almost surely, 2^450138554447 is an apocalyptic number.

450138554447 is a deficient number, since it is larger than the sum of its proper divisors (41989513).

450138554447 is a wasteful number, since it uses less digits than its factorization.

450138554447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41989512.

The product of its (nonzero) digits is 5376000, while the sum is 50.

The spelling of 450138554447 in words is "four hundred fifty billion, one hundred thirty-eight million, five hundred fifty-four thousand, four hundred forty-seven".