51840536433757 has 4 divisors (see below), whose sum is σ = 52550680768540. Its totient is φ = 51130392098976.

The previous prime is 51840536433743. The next prime is 51840536433781. The reversal of 51840536433757 is 75733463504815.

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 45348991715556 + 6491544718201 = 6734166^2 + 2547851^2 .

It is a cyclic number.

It is not a de Polignac number, because 51840536433757 - 2¹⁹ = 51840535909469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51840536433695 and 51840536433704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51840536433787) 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, 355072167282 + ... + 355072167427.

It is an arithmetic number, because the mean of its divisors is an integer number (13137670192135).

Almost surely, 2^{51840536433757} is an apocalyptic number.

It is an amenable number.

51840536433757 is a deficient number, since it is larger than the sum of its proper divisors (710144334783).

51840536433757 is an equidigital number, since it uses as much as digits as its factorization.

51840536433757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710144334782.

The product of its (nonzero) digits is 127008000, while the sum is 61.

The spelling of 51840536433757 in words is "fifty-one trillion, eight hundred forty billion, five hundred thirty-six million, four hundred thirty-three thousand, seven hundred fifty-seven".