12890528557 has 2 divisors, whose sum is σ = 12890528558. Its totient is φ = 12890528556.

The previous prime is 12890528551. The next prime is 12890528591. The reversal of 12890528557 is 75582509821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8709742276 + 4180786281 = 93326^2 + 64659^2 .

It is a cyclic number.

It is not a de Polignac number, because 12890528557 - 2⁷ = 12890528429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12890528551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445264278 + 6445264279.

It is an arithmetic number, because the mean of its divisors is an integer number (6445264279).

Almost surely, 2^12890528557 is an apocalyptic number.

It is an amenable number.

12890528557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12890528557 is an equidigital number, since it uses as much as digits as its factorization.

12890528557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 52.

The spelling of 12890528557 in words is "twelve billion, eight hundred ninety million, five hundred twenty-eight thousand, five hundred fifty-seven".