51438641728732 has 24 divisors (see below), whose sum is σ = 95638481134560. Its totient is φ = 24161300493120.

The previous prime is 51438641728723. The next prime is 51438641728753. The reversal of 51438641728732 is 23782714683415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5992381744 + ... + 5992390327.

It is an arithmetic number, because the mean of its divisors is an integer number (3984936713940).

Almost surely, 2^{51438641728732} is an apocalyptic number.

It is an amenable number.

51438641728732 is a deficient number, since it is larger than the sum of its proper divisors (44199839405828).

51438641728732 is a wasteful number, since it uses less digits than its factorization.

51438641728732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11984772141 (or 11984772139 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 61.

The spelling of 51438641728732 in words is "fifty-one trillion, four hundred thirty-eight billion, six hundred forty-one million, seven hundred twenty-eight thousand, seven hundred thirty-two".