450168891 has 12 divisors (see below), whose sum is σ = 635746536. Its totient is φ = 282363840.

The previous prime is 450168877. The next prime is 450168923. The reversal of 450168891 is 198861054.

It is not a de Polignac number, because 450168891 - 2¹⁵ = 450136123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (450168841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150036 + ... + 153006.

It is an arithmetic number, because the mean of its divisors is an integer number (52978878).

Almost surely, 2^450168891 is an apocalyptic number.

450168891 is a deficient number, since it is larger than the sum of its proper divisors (185577645).

450168891 is an frugal number, since it uses more digits than its factorization.

450168891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5962 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 450168891 is about 21217.1838612008. The cubic root of 450168891 is about 766.4052891183.

The spelling of 450168891 in words is "four hundred fifty million, one hundred sixty-eight thousand, eight hundred ninety-one".