450423435661 has 4 divisors (see below), whose sum is σ = 465955278300. Its totient is φ = 434891593024.

The previous prime is 450423435641. The next prime is 450423435673. The reversal of 450423435661 is 166534324054.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 165918543561 + 284504892100 = 407331^2 + 533390^2 .

It is a cyclic number.

It is not a de Polignac number, because 450423435661 - 2¹³ = 450423427469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450423435601) 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, 7765921276 + ... + 7765921333.

It is an arithmetic number, because the mean of its divisors is an integer number (116488819575).

Almost surely, 2^450423435661 is an apocalyptic number.

It is an amenable number.

450423435661 is a deficient number, since it is larger than the sum of its proper divisors (15531842639).

450423435661 is a wasteful number, since it uses less digits than its factorization.

450423435661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15531842638.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 450423435661 in words is "four hundred fifty billion, four hundred twenty-three million, four hundred thirty-five thousand, six hundred sixty-one".