451109664 has 36 divisors (see below), whose sum is σ = 1282843926. Its totient is φ = 150369792.

The previous prime is 451109657. The next prime is 451109683. The reversal of 451109664 is 466901154.

It can be written as a sum of positive squares in only one way, i.e., 327899664 + 123210000 = 18108^2 + 11100^2 .

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 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 5 ways as a sum of consecutive naturals, for example, 782889 + ... + 783464.

Almost surely, 2^451109664 is an apocalyptic number.

It is an amenable number.

451109664 is an abundant number, since it is smaller than the sum of its proper divisors (831734262).

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

451109664 is a wasteful number, since it uses less digits than its factorization.

451109664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566369 (or 1566358 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 451109664 is about 21239.3423627004. The cubic root of 451109664 is about 766.9388012708.

The spelling of 451109664 in words is "four hundred fifty-one million, one hundred nine thousand, six hundred sixty-four".