12646264620 has 192 divisors, whose sum is σ = 40726167552. Its totient is φ = 2903520000.

The previous prime is 12646264597. The next prime is 12646264633. The reversal of 12646264620 is 2646264621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 955045 + ... + 968195.

It is an arithmetic number, because the mean of its divisors is an integer number (212115456).

Almost surely, 2^12646264620 is an apocalyptic number.

12646264620 is a gapful number since it is divisible by the number (10) 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 12646264620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20363083776).

12646264620 is an abundant number, since it is smaller than the sum of its proper divisors (28079902932).

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

12646264620 is a wasteful number, since it uses less digits than its factorization.

12646264620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13252 (or 13250 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

Subtracting from 12646264620 its reverse (2646264621), we obtain a palindrome (9999999999).

The spelling of 12646264620 in words is "twelve billion, six hundred forty-six million, two hundred sixty-four thousand, six hundred twenty".