251128585245673 has 2 divisors, whose sum is σ = 251128585245674. Its totient is φ = 251128585245672.

The previous prime is 251128585245569. The next prime is 251128585245767. The reversal of 251128585245673 is 376542585821152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156506430124009 + 94622155121664 = 12510253^2 + 9727392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251128585245673 is a prime.

It is not a weakly prime, because it can be changed into another prime (251128585245973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125564292622836 + 125564292622837.

It is an arithmetic number, because the mean of its divisors is an integer number (125564292622837).

Almost surely, 2^{251128585245673} is an apocalyptic number.

It is an amenable number.

251128585245673 is a deficient number, since it is larger than the sum of its proper divisors (1).

251128585245673 is an equidigital number, since it uses as much as digits as its factorization.

251128585245673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280000, while the sum is 64.

The spelling of 251128585245673 in words is "two hundred fifty-one trillion, one hundred twenty-eight billion, five hundred eighty-five million, two hundred forty-five thousand, six hundred seventy-three".