12563699952 has 80 divisors (see below), whose sum is σ = 34248165120. Its totient is φ = 3960777216.

The previous prime is 12563699893. The next prime is 12563699959. The reversal of 12563699952 is 25999636521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12563699892 and 12563699901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563699959) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 34323 + ... + 162189.

It is an arithmetic number, because the mean of its divisors is an integer number (428102064).

Almost surely, 2^12563699952 is an apocalyptic number.

12563699952 is a gapful number since it is divisible by the number (12) 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 12563699952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17124082560).

12563699952 is an abundant number, since it is smaller than the sum of its proper divisors (21684465168).

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

12563699952 is a wasteful number, since it uses less digits than its factorization.

12563699952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127990 (or 127984 counting only the distinct ones).

The product of its digits is 7873200, while the sum is 57.

The spelling of 12563699952 in words is "twelve billion, five hundred sixty-three million, six hundred ninety-nine thousand, nine hundred fifty-two".