12511565016 has 64 divisors (see below), whose sum is σ = 31976294400. Its totient is φ = 4078281600.

The previous prime is 12511564997. The next prime is 12511565023. The reversal of 12511565016 is 61056511521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247326 + ... + 293586.

It is an arithmetic number, because the mean of its divisors is an integer number (499629600).

Almost surely, 2^12511565016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12511565016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15988147200).

12511565016 is an abundant number, since it is smaller than the sum of its proper divisors (19464729384).

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

12511565016 is a wasteful number, since it uses less digits than its factorization.

12511565016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46520 (or 46516 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 12511565016 in words is "twelve billion, five hundred eleven million, five hundred sixty-five thousand, sixteen".