51595631749 has 2 divisors, whose sum is σ = 51595631750. Its totient is φ = 51595631748.

The previous prime is 51595631719. The next prime is 51595631921. The reversal of 51595631749 is 94713659515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42861420900 + 8734210849 = 207030^2 + 93457^2 .

It is a cyclic number.

It is not a de Polignac number, because 51595631749 - 2¹⁵ = 51595598981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51595631749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51595631719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25797815874 + 25797815875.

It is an arithmetic number, because the mean of its divisors is an integer number (25797815875).

Almost surely, 2^51595631749 is an apocalyptic number.

It is an amenable number.

51595631749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51595631749 is an equidigital number, since it uses as much as digits as its factorization.

51595631749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103000, while the sum is 55.

The spelling of 51595631749 in words is "fifty-one billion, five hundred ninety-five million, six hundred thirty-one thousand, seven hundred forty-nine".