12566035536 has 80 divisors (see below), whose sum is σ = 32958926208. Its totient is φ = 4124736000.

The previous prime is 12566035513. The next prime is 12566035543. The reversal of 12566035536 is 63553066521.

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, 3805086 + ... + 3808386.

Almost surely, 2^12566035536 is an apocalyptic number.

12566035536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12566035536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16479463104).

12566035536 is an abundant number, since it is smaller than the sum of its proper divisors (20392890672).

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

12566035536 is a wasteful number, since it uses less digits than its factorization.

12566035536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500 (or 4494 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 12566035536 in words is "twelve billion, five hundred sixty-six million, thirty-five thousand, five hundred thirty-six".