51325657340545 has 12 divisors (see below), whose sum is σ = 71646427798164. Its totient is φ = 35194736461920.

The previous prime is 51325657340539. The next prime is 51325657340557. The reversal of 51325657340545 is 54504375652315.

It can be written as a sum of positive squares in 2 ways, for example, as 5373907512561 + 45951749827984 = 2318169^2 + 6778772^2 .

It is not a de Polignac number, because 51325657340545 - 2¹¹ = 51325657338497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104746239226 + ... + 104746239715.

It is an arithmetic number, because the mean of its divisors is an integer number (5970535649847).

Almost surely, 2^{51325657340545} is an apocalyptic number.

It is an amenable number.

51325657340545 is a deficient number, since it is larger than the sum of its proper divisors (20320770457619).

51325657340545 is a wasteful number, since it uses less digits than its factorization.

51325657340545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209492478960 (or 209492478953 counting only the distinct ones).

The product of its (nonzero) digits is 37800000, while the sum is 55.

The spelling of 51325657340545 in words is "fifty-one trillion, three hundred twenty-five billion, six hundred fifty-seven million, three hundred forty thousand, five hundred forty-five".