51752845322081 has 4 divisors (see below), whose sum is σ = 51752924063172. Its totient is φ = 51752766580992.

The previous prime is 51752845322071. The next prime is 51752845322093. The reversal of 51752845322081 is 18022354825715.

It is a happy number.

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 5963046544225 + 45789798777856 = 2441935^2 + 6766816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51752845322081 is a prime.

It is a super-2 number, since 2×51752845322081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51752845322051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38376296 + ... + 39701961.

It is an arithmetic number, because the mean of its divisors is an integer number (12938231015793).

Almost surely, 2^{51752845322081} is an apocalyptic number.

It is an amenable number.

51752845322081 is a deficient number, since it is larger than the sum of its proper divisors (78741091).

51752845322081 is an equidigital number, since it uses as much as digits as its factorization.

51752845322081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78741090.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 51752845322081 in words is "fifty-one trillion, seven hundred fifty-two billion, eight hundred forty-five million, three hundred twenty-two thousand, eighty-one".