452721187128 has 64 divisors (see below), whose sum is σ = 1294566693120. Its totient is φ = 129241152000.

The previous prime is 452721187117. The next prime is 452721187159. The reversal of 452721187128 is 821781127254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 920118 + ... + 1323653.

It is an arithmetic number, because the mean of its divisors is an integer number (20227604580).

Almost surely, 2^452721187128 is an apocalyptic number.

It is an amenable number.

452721187128 is an abundant number, since it is smaller than the sum of its proper divisors (841845505992).

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

452721187128 is a wasteful number, since it uses less digits than its factorization.

452721187128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244988 (or 2244984 counting only the distinct ones).

The product of its digits is 501760, while the sum is 48.

The spelling of 452721187128 in words is "four hundred fifty-two billion, seven hundred twenty-one million, one hundred eighty-seven thousand, one hundred twenty-eight".