12635444052 has 144 divisors (see below), whose sum is σ = 39885535872. Its totient is φ = 3276599040.

The previous prime is 12635443999. The next prime is 12635444053. The reversal of 12635444052 is 25044453621.

12635444052 is a `hidden beast` number, since 1 + 2 + 63 + 544 + 4 + 0 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12635443998 and 12635444016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12635444053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1873278 + ... + 1880010.

It is an arithmetic number, because the mean of its divisors is an integer number (276982888).

Almost surely, 2^12635444052 is an apocalyptic number.

12635444052 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 12635444052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19942767936).

12635444052 is an abundant number, since it is smaller than the sum of its proper divisors (27250091820).

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

12635444052 is a wasteful number, since it uses less digits than its factorization.

12635444052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438 (or 7433 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 12635444052 its reverse (25044453621), we get a palindrome (37679897673).

The spelling of 12635444052 in words is "twelve billion, six hundred thirty-five million, four hundred forty-four thousand, fifty-two".