51543543123 has 24 divisors (see below), whose sum is σ = 75036998400. Its totient is φ = 34092591984.

The previous prime is 51543543097. The next prime is 51543543131. The reversal of 51543543123 is 32134534515.

51543543123 is a `hidden beast` number, since 51 + 5 + 43 + 543 + 1 + 23 = 666.

It is not a de Polignac number, because 51543543123 - 2⁸ = 51543542867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51543543173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1997538 + ... + 2023176.

It is an arithmetic number, because the mean of its divisors is an integer number (3126541600).

Almost surely, 2^51543543123 is an apocalyptic number.

51543543123 is a deficient number, since it is larger than the sum of its proper divisors (23493455277).

51543543123 is a wasteful number, since it uses less digits than its factorization.

51543543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27391 (or 27388 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 51543543123 in words is "fifty-one billion, five hundred forty-three million, five hundred forty-three thousand, one hundred twenty-three".