451128945520 has 40 divisors (see below), whose sum is σ = 1144227054960. Its totient is φ = 164046888960.

The previous prime is 451128945503. The next prime is 451128945521. The reversal of 451128945520 is 25549821154.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451128945521) 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 7 ways as a sum of consecutive naturals, for example, 256322385 + ... + 256324144.

It is an arithmetic number, because the mean of its divisors is an integer number (28605676374).

Almost surely, 2^451128945520 is an apocalyptic number.

451128945520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451128945520 is an abundant number, since it is smaller than the sum of its proper divisors (693098109440).

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

451128945520 is a wasteful number, since it uses less digits than its factorization.

451128945520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512646553 (or 512646547 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 451128945520 in words is "four hundred fifty-one billion, one hundred twenty-eight million, nine hundred forty-five thousand, five hundred twenty".