51726777250657 has 2 divisors, whose sum is σ = 51726777250658. Its totient is φ = 51726777250656.

The previous prime is 51726777250649. The next prime is 51726777250667. The reversal of 51726777250657 is 75605277762715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51597442794496 + 129334456161 = 7183136^2 + 359631^2 .

It is a cyclic number.

It is not a de Polignac number, because 51726777250657 - 2³ = 51726777250649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51726777250592 and 51726777250601.

It is not a weakly prime, because it can be changed into another prime (51726777250637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25863388625328 + 25863388625329.

It is an arithmetic number, because the mean of its divisors is an integer number (25863388625329).

Almost surely, 2^{51726777250657} is an apocalyptic number.

It is an amenable number.

51726777250657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726777250657 is an equidigital number, since it uses as much as digits as its factorization.

51726777250657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302526000, while the sum is 67.

The spelling of 51726777250657 in words is "fifty-one trillion, seven hundred twenty-six billion, seven hundred seventy-seven million, two hundred fifty thousand, six hundred fifty-seven".