451811368 has 8 divisors (see below), whose sum is σ = 847146330. Its totient is φ = 225905680.

The previous prime is 451811357. The next prime is 451811369. The reversal of 451811368 is 863118154.

It can be written as a sum of positive squares in only one way, i.e., 388799524 + 63011844 = 19718^2 + 7938^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (451811369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28238203 + ... + 28238218.

Almost surely, 2^451811368 is an apocalyptic number.

It is an amenable number.

451811368 is a deficient number, since it is larger than the sum of its proper divisors (395334962).

451811368 is a wasteful number, since it uses less digits than its factorization.

451811368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56476427 (or 56476423 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 451811368 is about 21255.8549110592. The cubic root of 451811368 is about 767.3362546834.

The spelling of 451811368 in words is "four hundred fifty-one million, eight hundred eleven thousand, three hundred sixty-eight".