451643020780 has 48 divisors (see below), whose sum is σ = 1084003373376. Its totient is φ = 154840446720.

The previous prime is 451643020723. The next prime is 451643020799. The reversal of 451643020780 is 87020346154.

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 15 ways as a sum of consecutive naturals, for example, 2768442 + ... + 2927038.

It is an arithmetic number, because the mean of its divisors is an integer number (22583403612).

Almost surely, 2^451643020780 is an apocalyptic number.

It is an amenable number.

451643020780 is an abundant number, since it is smaller than the sum of its proper divisors (632360352596).

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

451643020780 is a wasteful number, since it uses less digits than its factorization.

451643020780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178954 (or 178952 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 451643020780 in words is "four hundred fifty-one billion, six hundred forty-three million, twenty thousand, seven hundred eighty".