450861691644 has 144 divisors (see below), whose sum is σ = 1454632245248. Its totient is φ = 118908554688.

The previous prime is 450861691619. The next prime is 450861691717. The reversal of 450861691644 is 446196168054.

450861691644 is a `hidden beast` number, since 4 + 5 + 0 + 8 + 616 + 9 + 16 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2460172 + ... + 2637075.

Almost surely, 2^450861691644 is an apocalyptic number.

It is an amenable number.

450861691644 is an abundant number, since it is smaller than the sum of its proper divisors (1003770553604).

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

450861691644 is a wasteful number, since it uses less digits than its factorization.

450861691644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097286 (or 5097272 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 450861691644 in words is "four hundred fifty billion, eight hundred sixty-one million, six hundred ninety-one thousand, six hundred forty-four".