451555164 has 18 divisors (see below), whose sum is σ = 1141431200. Its totient is φ = 150518376.

The previous prime is 451555157. The next prime is 451555171. The reversal of 451555164 is 461555154.

451555164 is a `hidden beast` number, since 45 + 1 + 5 + 551 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (451555157) and next prime (451555171).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×451555164² = 407804132270133792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 12543199 = 451555164 / (4 + 5 + 1 + 5 + 5 + 5 + 1 + 6 + 4).

It is a congruent number.

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 in 5 ways as a sum of consecutive naturals, for example, 6271564 + ... + 6271635.

Almost surely, 2^451555164 is an apocalyptic number.

It is an amenable number.

451555164 is an abundant number, since it is smaller than the sum of its proper divisors (689876036).

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

451555164 is a wasteful number, since it uses less digits than its factorization.

451555164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543209 (or 12543204 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 451555164 is about 21249.8273875342. The cubic root of 451555164 is about 767.1911854475.

The spelling of 451555164 in words is "four hundred fifty-one million, five hundred fifty-five thousand, one hundred sixty-four".