51438416534464 has 56 divisors (see below), whose sum is σ = 102409987395008. Its totient is φ = 25634342522880.

The previous prime is 51438416534443. The next prime is 51438416534467. The reversal of 51438416534464 is 46443561483415.

It is a junction number, because it is equal to n+sod(n) for n = 51438416534399 and 51438416534408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51438416534467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197605804 + ... + 197865940.

Almost surely, 2^{51438416534464} is an apocalyptic number.

It is an amenable number.

51438416534464 is a deficient number, since it is larger than the sum of its proper divisors (50971570860544).

51438416534464 is a wasteful number, since it uses less digits than its factorization.

51438416534464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270333 (or 270323 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 58.

The spelling of 51438416534464 in words is "fifty-one trillion, four hundred thirty-eight billion, four hundred sixteen million, five hundred thirty-four thousand, four hundred sixty-four".