450671281891 has 4 divisors (see below), whose sum is σ = 450679101984. Its totient is φ = 450663461800.

The previous prime is 450671281843. The next prime is 450671281927. The reversal of 450671281891 is 198182176054.

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 450671281891 - 2²¹ = 450669184739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450671281691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3822955 + ... + 3939076.

It is an arithmetic number, because the mean of its divisors is an integer number (112669775496).

Almost surely, 2^450671281891 is an apocalyptic number.

450671281891 is a deficient number, since it is larger than the sum of its proper divisors (7820093).

450671281891 is an equidigital number, since it uses as much as digits as its factorization.

450671281891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7820092.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 450671281891 in words is "four hundred fifty billion, six hundred seventy-one million, two hundred eighty-one thousand, eight hundred ninety-one".