451722664 has 8 divisors (see below), whose sum is σ = 846980010. Its totient is φ = 225861328.

The previous prime is 451722653. The next prime is 451722673. The reversal of 451722664 is 466227154.

It can be written as a sum of positive squares in only one way, i.e., 234396100 + 217326564 = 15310^2 + 14742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 28232659 + ... + 28232674.

Almost surely, 2^451722664 is an apocalyptic number.

It is an amenable number.

451722664 is a deficient number, since it is larger than the sum of its proper divisors (395257346).

451722664 is a wasteful number, since it uses less digits than its factorization.

451722664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56465339 (or 56465335 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 451722664 is about 21253.7682305985. The cubic root of 451722664 is about 767.2860344256.

The spelling of 451722664 in words is "four hundred fifty-one million, seven hundred twenty-two thousand, six hundred sixty-four".