64524128257 has 2 divisors, whose sum is σ = 64524128258. Its totient is φ = 64524128256.

The previous prime is 64524128239. The next prime is 64524128293. The reversal of 64524128257 is 75282142546.

It is a Cunningham number, because it is equal to 504⁴+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64524128256 + 1 = 254016^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 64524128257 - 2⁷ = 64524128129 is a prime.

It is not a weakly prime, because it can be changed into another prime (64524128657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32262064128 + 32262064129.

It is an arithmetic number, because the mean of its divisors is an integer number (32262064129).

Almost surely, 2^64524128257 is an apocalyptic number.

It is an amenable number.

64524128257 is a deficient number, since it is larger than the sum of its proper divisors (1).

64524128257 is an equidigital number, since it uses as much as digits as its factorization.

64524128257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1075200, while the sum is 46.

The spelling of 64524128257 in words is "sixty-four billion, five hundred twenty-four million, one hundred twenty-eight thousand, two hundred fifty-seven".