51533448845440 has 64 divisors (see below), whose sum is σ = 123332981808960. Its totient is φ = 20590652316672.

The previous prime is 51533448845363. The next prime is 51533448845497. The reversal of 51533448845440 is 4454884433515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43808172 + ... + 44969131.

It is an arithmetic number, because the mean of its divisors is an integer number (1927077840765).

Almost surely, 2^{51533448845440} is an apocalyptic number.

It is an amenable number.

51533448845440 is an abundant number, since it is smaller than the sum of its proper divisors (71799532963520).

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

51533448845440 is an equidigital number, since it uses as much as digits as its factorization.

51533448845440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88778229 (or 88778217 counting only the distinct ones).

The product of its (nonzero) digits is 73728000, while the sum is 58.

The spelling of 51533448845440 in words is "fifty-one trillion, five hundred thirty-three billion, four hundred forty-eight million, eight hundred forty-five thousand, four hundred forty".