51657274888249 has 2 divisors, whose sum is σ = 51657274888250. Its totient is φ = 51657274888248.

The previous prime is 51657274888187. The next prime is 51657274888319. The reversal of 51657274888249 is 94288847275615.

51657274888249 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., 27027573428025 + 24629701460224 = 5198805^2 + 4962832^2 .

It is a cyclic number.

It is not a de Polignac number, because 51657274888249 - 2²¹ = 51657272791097 is a prime.

It is not a weakly prime, because it can be changed into another prime (51657274828249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25828637444124 + 25828637444125.

It is an arithmetic number, because the mean of its divisors is an integer number (25828637444125).

Almost surely, 2^{51657274888249} is an apocalyptic number.

It is an amenable number.

51657274888249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51657274888249 is an equidigital number, since it uses as much as digits as its factorization.

51657274888249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2167603200, while the sum is 76.

The spelling of 51657274888249 in words is "fifty-one trillion, six hundred fifty-seven billion, two hundred seventy-four million, eight hundred eighty-eight thousand, two hundred forty-nine".