454391816899 has 4 divisors (see below), whose sum is σ = 454824984600. Its totient is φ = 453958649200.

The previous prime is 454391816897. The next prime is 454391816909. The reversal of 454391816899 is 998618193454.

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 454391816899 - 2¹ = 454391816897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (454391816897) 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, 216582277 + ... + 216584374.

It is an arithmetic number, because the mean of its divisors is an integer number (113706246150).

Almost surely, 2^454391816899 is an apocalyptic number.

454391816899 is a deficient number, since it is larger than the sum of its proper divisors (433167701).

454391816899 is a wasteful number, since it uses less digits than its factorization.

454391816899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433167700.

The product of its digits is 67184640, while the sum is 67.

The spelling of 454391816899 in words is "four hundred fifty-four billion, three hundred ninety-one million, eight hundred sixteen thousand, eight hundred ninety-nine".