12521505445544 has 32 divisors (see below), whose sum is σ = 23600168286240. Its totient is φ = 6228155102400.

The previous prime is 12521505445507. The next prime is 12521505445601. The reversal of 12521505445544 is 44554450512521.

12521505445544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856642 + ... + 5337614.

It is an arithmetic number, because the mean of its divisors is an integer number (737505258945).

Almost surely, 2^{12521505445544} is an apocalyptic number.

It is an amenable number.

12521505445544 is a deficient number, since it is larger than the sum of its proper divisors (11078662840696).

12521505445544 is a wasteful number, since it uses less digits than its factorization.

12521505445544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483321 (or 3483317 counting only the distinct ones).

The product of its (nonzero) digits is 3200000, while the sum is 47.

The spelling of 12521505445544 in words is "twelve trillion, five hundred twenty-one billion, five hundred five million, four hundred forty-five thousand, five hundred forty-four".