51533448845438 has 24 divisors (see below), whose sum is σ = 89990369917200. Its totient is φ = 22068629707488.

The previous prime is 51533448845363. The next prime is 51533448845497. The reversal of 51533448845438 is 83454884433515.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203850218 + ... + 204102861.

It is an arithmetic number, because the mean of its divisors is an integer number (3749598746550).

Almost surely, 2^{51533448845438} is an apocalyptic number.

51533448845438 is a deficient number, since it is larger than the sum of its proper divisors (38456921071762).

51533448845438 is a wasteful number, since it uses less digits than its factorization.

51533448845438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407954384 (or 407954377 counting only the distinct ones).

The product of its digits is 442368000, while the sum is 65.

The spelling of 51533448845438 in words is "fifty-one trillion, five hundred thirty-three billion, four hundred forty-eight million, eight hundred forty-five thousand, four hundred thirty-eight".