451621164 has 24 divisors (see below), whose sum is σ = 1071645120. Its totient is φ = 147988624.

The previous prime is 451621153. The next prime is 451621189. The reversal of 451621164 is 461126154.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318234 + ... + 319649.

It is an arithmetic number, because the mean of its divisors is an integer number (44651880).

Almost surely, 2^451621164 is an apocalyptic number.

It is an amenable number.

451621164 is an abundant number, since it is smaller than the sum of its proper divisors (620023956).

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

451621164 is a wasteful number, since it uses less digits than its factorization.

451621164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637949 (or 637947 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 451621164 is about 21251.3802845839. The cubic root of 451621164 is about 767.2285615760.

The spelling of 451621164 in words is "four hundred fifty-one million, six hundred twenty-one thousand, one hundred sixty-four".