1538525052257 has 2 divisors, whose sum is σ = 1538525052258. Its totient is φ = 1538525052256.

The previous prime is 1538525052247. The next prime is 1538525052299. The reversal of 1538525052257 is 7522505258351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820372193536 + 718152858721 = 905744^2 + 847439^2 .

It is an emirp because it is prime and its reverse (7522505258351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1538525052257 - 2⁴ = 1538525052241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1538525052247) 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, 769262526128 + 769262526129.

It is an arithmetic number, because the mean of its divisors is an integer number (769262526129).

Almost surely, 2^{1538525052257} is an apocalyptic number.

It is an amenable number.

1538525052257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538525052257 is an equidigital number, since it uses as much as digits as its factorization.

1538525052257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200000, while the sum is 50.

The spelling of 1538525052257 in words is "one trillion, five hundred thirty-eight billion, five hundred twenty-five million, fifty-two thousand, two hundred fifty-seven".