451089661 has 4 divisors (see below), whose sum is σ = 492097824. Its totient is φ = 410081500.

The previous prime is 451089643. The next prime is 451089677. The reversal of 451089661 is 166980154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 451089661 - 2⁵ = 451089629 is a prime.

It is a super-2 number, since 2×451089661² = 406963764522189842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451089361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20504065 + ... + 20504086.

It is an arithmetic number, because the mean of its divisors is an integer number (123024456).

Almost surely, 2^451089661 is an apocalyptic number.

It is an amenable number.

451089661 is a deficient number, since it is larger than the sum of its proper divisors (41008163).

451089661 is a wasteful number, since it uses less digits than its factorization.

451089661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41008162.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 451089661 is about 21238.8714624859. The cubic root of 451089661 is about 766.9274652958.

The spelling of 451089661 in words is "four hundred fifty-one million, eighty-nine thousand, six hundred sixty-one".