451161612 has 144 divisors (see below), whose sum is σ = 1332414720. Its totient is φ = 127267200.

The previous prime is 451161611. The next prime is 451161661. The reversal of 451161612 is 216161154.

451161612 is a `hidden beast` number, since 45 + 1 + 1 + 6 + 1 + 612 = 666.

It is not an unprimeable number, because it can be changed into a prime (451161611) 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 in 47 ways as a sum of consecutive naturals, for example, 458473 + ... + 459455.

It is an arithmetic number, because the mean of its divisors is an integer number (9252880).

Almost surely, 2^451161612 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 451161612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666207360).

451161612 is an abundant number, since it is smaller than the sum of its proper divisors (881253108).

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

451161612 is a wasteful number, since it uses less digits than its factorization.

451161612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1079 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 451161612 is about 21240.5652467160. The cubic root of 451161612 is about 766.9682393511.

The spelling of 451161612 in words is "four hundred fifty-one million, one hundred sixty-one thousand, six hundred twelve".