51543040000000 has 272 divisors, whose sum is σ = 128869086891168. Its totient is φ = 20615168000000.

The previous prime is 51543039999949. The next prime is 51543040000043. The reversal of 51543040000000 is 4034515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5119994967 + ... + 5120005033.

Almost surely, 2^{51543040000000} is an apocalyptic number.

51543040000000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51543040000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64434543445584).

51543040000000 is an abundant number, since it is smaller than the sum of its proper divisors (77326046891168).

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

51543040000000 is an frugal number, since it uses more digits than its factorization.

51543040000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134 (or 10074 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 51543040000000 its reverse (4034515), we get a palindrome (51543044034515).

The spelling of 51543040000000 in words is "fifty-one trillion, five hundred forty-three billion, forty million", and thus it is an aban number.