51535746557 has 2 divisors, whose sum is σ = 51535746558. Its totient is φ = 51535746556.

The previous prime is 51535746499. The next prime is 51535746601. The reversal of 51535746557 is 75564753515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31058422756 + 20477323801 = 176234^2 + 143099^2 .

It is a cyclic number.

It is not a de Polignac number, because 51535746557 - 2¹⁰ = 51535745533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51535746499 and 51535746508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51535749557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767873278 + 25767873279.

It is an arithmetic number, because the mean of its divisors is an integer number (25767873279).

Almost surely, 2^51535746557 is an apocalyptic number.

It is an amenable number.

51535746557 is a deficient number, since it is larger than the sum of its proper divisors (1).

51535746557 is an equidigital number, since it uses as much as digits as its factorization.

51535746557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11025000, while the sum is 53.

The spelling of 51535746557 in words is "fifty-one billion, five hundred thirty-five million, seven hundred forty-six thousand, five hundred fifty-seven".