51350735521537 has 4 divisors (see below), whose sum is σ = 51351504070356. Its totient is φ = 51349966972720.

The previous prime is 51350735521451. The next prime is 51350735521541. The reversal of 51350735521537 is 73512553705315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19737903165696 + 31612832355841 = 4442736^2 + 5622529^2 .

It is a cyclic number.

It is not a de Polignac number, because 51350735521537 - 2¹⁵ = 51350735488769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51350735524537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384174178 + ... + 384307819.

It is an arithmetic number, because the mean of its divisors is an integer number (12837876017589).

Almost surely, 2^{51350735521537} is an apocalyptic number.

It is an amenable number.

51350735521537 is a deficient number, since it is larger than the sum of its proper divisors (768548819).

51350735521537 is an equidigital number, since it uses as much as digits as its factorization.

51350735521537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768548818.

The product of its (nonzero) digits is 8268750, while the sum is 52.

The spelling of 51350735521537 in words is "fifty-one trillion, three hundred fifty billion, seven hundred thirty-five million, five hundred twenty-one thousand, five hundred thirty-seven".