12890528556 has 12 divisors (see below), whose sum is σ = 30077899992. Its totient is φ = 4296842848.

The previous prime is 12890528551. The next prime is 12890528557. The reversal of 12890528556 is 65582509821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12890528499 and 12890528508.

It is not an unprimeable number, because it can be changed into a prime (12890528551) 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, 537105345 + ... + 537105368.

It is an arithmetic number, because the mean of its divisors is an integer number (2506491666).

Almost surely, 2^12890528556 is an apocalyptic number.

It is an amenable number.

12890528556 is an abundant number, since it is smaller than the sum of its proper divisors (17187371436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12890528556 is a wasteful number, since it uses less digits than its factorization.

12890528556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074210720 (or 1074210718 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 12890528556 in words is "twelve billion, eight hundred ninety million, five hundred twenty-eight thousand, five hundred fifty-six".