12523646336 has 64 divisors (see below), whose sum is σ = 25788500880. Its totient is φ = 6053419008.

The previous prime is 12523646323. The next prime is 12523646347. The reversal of 12523646336 is 63364632521.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 12523646293 and 12523646302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735131 + ... + 751973.

Almost surely, 2^12523646336 is an apocalyptic number.

12523646336 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 12523646336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12894250440).

12523646336 is an abundant number, since it is smaller than the sum of its proper divisors (13264854544).

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

12523646336 is a wasteful number, since it uses less digits than its factorization.

12523646336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17051 (or 17039 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The spelling of 12523646336 in words is "twelve billion, five hundred twenty-three million, six hundred forty-six thousand, three hundred thirty-six".