450405381138 has 32 divisors (see below), whose sum is σ = 902811381120. Its totient is φ = 149801984640.

The previous prime is 450405381089. The next prime is 450405381161. The reversal of 450405381138 is 831183504054.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 450405381138.

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, 6291123 + ... + 6362313.

It is an arithmetic number, because the mean of its divisors is an integer number (28212855660).

Almost surely, 2^450405381138 is an apocalyptic number.

450405381138 is an abundant number, since it is smaller than the sum of its proper divisors (452405999982).

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

450405381138 is a wasteful number, since it uses less digits than its factorization.

450405381138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73522.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 450405381138 in words is "four hundred fifty billion, four hundred five million, three hundred eighty-one thousand, one hundred thirty-eight".