12890528569 has 4 divisors (see below), whose sum is σ = 12892760320. Its totient is φ = 12888296820.

The previous prime is 12890528557. The next prime is 12890528591. The reversal of 12890528569 is 96582509821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12890528569 - 2³³ = 4300593977 is a prime.

It is a super-2 number, since 2×12890528569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12890528369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107189 + ... + 1118770.

It is an arithmetic number, because the mean of its divisors is an integer number (3223190080).

Almost surely, 2^12890528569 is an apocalyptic number.

It is an amenable number.

12890528569 is a deficient number, since it is larger than the sum of its proper divisors (2231751).

12890528569 is an equidigital number, since it uses as much as digits as its factorization.

12890528569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231750.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 12890528569 in words is "twelve billion, eight hundred ninety million, five hundred twenty-eight thousand, five hundred sixty-nine".