51724242677 has 2 divisors, whose sum is σ = 51724242678. Its totient is φ = 51724242676.

The previous prime is 51724242643. The next prime is 51724242683. The reversal of 51724242677 is 77624242715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26205458161 + 25518784516 = 161881^2 + 159746^2 .

It is a cyclic number.

It is not a de Polignac number, because 51724242677 - 2⁸ = 51724242421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51724242077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25862121338 + 25862121339.

It is an arithmetic number, because the mean of its divisors is an integer number (25862121339).

Almost surely, 2^51724242677 is an apocalyptic number.

It is an amenable number.

51724242677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51724242677 is an equidigital number, since it uses as much as digits as its factorization.

51724242677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1317120, while the sum is 47.

The spelling of 51724242677 in words is "fifty-one billion, seven hundred twenty-four million, two hundred forty-two thousand, six hundred seventy-seven".