51775395557 has 2 divisors, whose sum is σ = 51775395558. Its totient is φ = 51775395556.

The previous prime is 51775395547. The next prime is 51775395571. The reversal of 51775395557 is 75559357715.

51775395557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46448439361 + 5326956196 = 215519^2 + 72986^2 .

It is a cyclic number.

It is not a de Polignac number, because 51775395557 - 2²⁴ = 51758618341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51775395496 and 51775395505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51775395527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25887697778 + 25887697779.

It is an arithmetic number, because the mean of its divisors is an integer number (25887697779).

Almost surely, 2^51775395557 is an apocalyptic number.

It is an amenable number.

51775395557 is a deficient number, since it is larger than the sum of its proper divisors (1).

51775395557 is an equidigital number, since it uses as much as digits as its factorization.

51775395557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28940625, while the sum is 59.

The spelling of 51775395557 in words is "fifty-one billion, seven hundred seventy-five million, three hundred ninety-five thousand, five hundred fifty-seven".