12646715250 has 128 divisors (see below), whose sum is σ = 34475051520. Its totient is φ = 3069024000.

The previous prime is 12646715239. The next prime is 12646715281. The reversal of 12646715250 is 5251764621.

It is a super-2 number, since 2×12646715250² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 12646715199 and 12646715208.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 683116 + ... + 701384.

It is an arithmetic number, because the mean of its divisors is an integer number (269336340).

Almost surely, 2^12646715250 is an apocalyptic number.

12646715250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12646715250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17237525760).

12646715250 is an abundant number, since it is smaller than the sum of its proper divisors (21828336270).

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

12646715250 is a wasteful number, since it uses less digits than its factorization.

12646715250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18373 (or 18363 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 12646715250 in words is "twelve billion, six hundred forty-six million, seven hundred fifteen thousand, two hundred fifty".