12501060643561 has 16 divisors (see below), whose sum is σ = 14936711655168. Its totient is φ = 10229644339200.

The previous prime is 12501060643501. The next prime is 12501060643619. The reversal of 12501060643561 is 16534606010521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12501060643561 - 2¹¹ = 12501060641513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12501060643501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74432760 + ... + 74600521.

It is an arithmetic number, because the mean of its divisors is an integer number (933544478448).

Almost surely, 2^{12501060643561} is an apocalyptic number.

It is an amenable number.

12501060643561 is a deficient number, since it is larger than the sum of its proper divisors (2435651011607).

12501060643561 is a wasteful number, since it uses less digits than its factorization.

12501060643561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149033832.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 12501060643561 in words is "twelve trillion, five hundred one billion, sixty million, six hundred forty-three thousand, five hundred sixty-one".