451381536 has 36 divisors (see below), whose sum is σ = 1283617062. Its totient is φ = 150460416.

The previous prime is 451381531. The next prime is 451381543. The reversal of 451381536 is 635183154.

451381536 is a `hidden beast` number, since 45 + 1 + 3 + 81 + 536 = 666.

It can be written as a sum of positive squares in only one way, i.e., 296528400 + 154853136 = 17220^2 + 12444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 451381536.

It is not an unprimeable number, because it can be changed into a prime (451381531) 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 5 ways as a sum of consecutive naturals, for example, 783361 + ... + 783936.

Almost surely, 2^451381536 is an apocalyptic number.

It is an amenable number.

451381536 is an abundant number, since it is smaller than the sum of its proper divisors (832235526).

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

451381536 is a wasteful number, since it uses less digits than its factorization.

451381536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567313 (or 1567302 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 451381536 is about 21245.7415968471. The cubic root of 451381536 is about 767.0928416507.

The spelling of 451381536 in words is "four hundred fifty-one million, three hundred eighty-one thousand, five hundred thirty-six".