451045163646 has 48 divisors (see below), whose sum is σ = 1218407718528. Its totient is φ = 117154587600.

The previous prime is 451045163617. The next prime is 451045163669. The reversal of 451045163646 is 646361540154.

451045163646 is a `hidden beast` number, since 4 + 5 + 1 + 0 + 4 + 5 + 1 + 636 + 4 + 6 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162713320 + ... + 162716091.

It is an arithmetic number, because the mean of its divisors is an integer number (25383494136).

Almost surely, 2^451045163646 is an apocalyptic number.

451045163646 is an abundant number, since it is smaller than the sum of its proper divisors (767362554882).

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

451045163646 is a wasteful number, since it uses less digits than its factorization.

451045163646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325429437 (or 325429434 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 451045163646 in words is "four hundred fifty-one billion, forty-five million, one hundred sixty-three thousand, six hundred forty-six".