51421547536128 has 324 divisors, whose sum is σ = 188145687097368. Its totient is φ = 13356245790720.

The previous prime is 51421547536111. The next prime is 51421547536129. The reversal of 51421547536128 is 82163574512415.

51421547536128 is a `hidden beast` number, since 5 + 1 + 4 + 2 + 15 + 4 + 7 + 5 + 3 + 612 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421547536129) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19461651 + ... + 21945362.

Almost surely, 2^{51421547536128} is an apocalyptic number.

It is an amenable number.

51421547536128 is an abundant number, since it is smaller than the sum of its proper divisors (136724139561240).

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

51421547536128 is a wasteful number, since it uses less digits than its factorization.

51421547536128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41407060 (or 41407036 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 51421547536128 in words is "fifty-one trillion, four hundred twenty-one billion, five hundred forty-seven million, five hundred thirty-six thousand, one hundred twenty-eight".