12485380644 has 81 divisors (see below), whose sum is σ = 34710714129. Its totient is φ = 3781213920.

The previous prime is 12485380637. The next prime is 12485380673. The reversal of 12485380644 is 44608358421.

The square root of 12485380644 is 111738.

It is a perfect power (a square), and thus also a powerful number.

12485380644 is a `hidden beast` number, since 12 + 48 + 538 + 0 + 64 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4756860900 + 7728519744 = 68970^2 + 87912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12485380644.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7373862 + ... + 7375554.

Almost surely, 2^12485380644 is an apocalyptic number.

12485380644 is the 111738-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12485380644

12485380644 is an abundant number, since it is smaller than the sum of its proper divisors (22225333485).

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

12485380644 is a wasteful number, since it uses less digits than its factorization.

12485380644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

It can be divided in two parts, 12485 and 380644, that added together give a square (393129 = 627²).

The spelling of 12485380644 in words is "twelve billion, four hundred eighty-five million, three hundred eighty thousand, six hundred forty-four".