451811856 has 160 divisors (see below), whose sum is σ = 1303630848. Its totient is φ = 134184960.

The previous prime is 451811831. The next prime is 451811861. The reversal of 451811856 is 658118154.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 1340520 + ... + 1340856.

Almost surely, 2^451811856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451811856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651815424).

451811856 is an abundant number, since it is smaller than the sum of its proper divisors (851818992).

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

451811856 is a wasteful number, since it uses less digits than its factorization.

451811856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 443 counting only the distinct ones).

The product of its digits is 38400, while the sum is 39.

The square root of 451811856 is about 21255.8663902462. The cubic root of 451811856 is about 767.3365309491.

The spelling of 451811856 in words is "four hundred fifty-one million, eight hundred eleven thousand, eight hundred fifty-six".