12890528564 has 6 divisors (see below), whose sum is σ = 22558424994.
Its totient is φ = 6445264280.
The previous prime is 12890528557. The next prime is 12890528591. The reversal of 12890528564 is 46582509821.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 10500100900 + 2390427664 = 102470^2 + 48892^2
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611316067 + ... + 1611316074.
It is an arithmetic number, because the mean of its divisors is an integer number (3759737499).
Almost surely, 212890528564 is an apocalyptic number.
It is an amenable number.
12890528564 is a deficient number, since it is larger than the sum of its proper divisors (9667896430).
12890528564 is a wasteful number, since it uses less digits than its factorization.
12890528564 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3222632145 (or 3222632143 counting only the distinct ones).
The product of its (nonzero) digits is 1382400, while the sum is 50.
The spelling of 12890528564 in words is "twelve billion, eight hundred ninety million, five hundred twenty-eight thousand, five hundred sixty-four".