51518450755745 has 8 divisors (see below), whose sum is σ = 61822673375784. Its totient is φ = 41214405625344.

The previous prime is 51518450755621. The next prime is 51518450755801. The reversal of 51518450755745 is 54755705481515.

It can be written as a sum of positive squares in 4 ways, for example, as 2511562513681 + 49006888242064 = 1584791^2 + 7000492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51518450755745 - 2¹⁰ = 51518450754721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43732994 + ... + 44895563.

It is an arithmetic number, because the mean of its divisors is an integer number (7727834171973).

Almost surely, 2^{51518450755745} is an apocalyptic number.

It is an amenable number.

51518450755745 is a deficient number, since it is larger than the sum of its proper divisors (10304222620039).

51518450755745 is a wasteful number, since it uses less digits than its factorization.

51518450755745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88744819.

The product of its (nonzero) digits is 98000000, while the sum is 62.

The spelling of 51518450755745 in words is "fifty-one trillion, five hundred eighteen billion, four hundred fifty million, seven hundred fifty-five thousand, seven hundred forty-five".