12601044561 has 32 divisors (see below), whose sum is σ = 19538178048. Its totient is φ = 7074642240.

The previous prime is 12601044559. The next prime is 12601044737. The reversal of 12601044561 is 16544010621.

It is not a de Polignac number, because 12601044561 - 2¹ = 12601044559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12601044541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254220 + ... + 1264226.

It is an arithmetic number, because the mean of its divisors is an integer number (610568064).

Almost surely, 2^12601044561 is an apocalyptic number.

It is an amenable number.

12601044561 is a deficient number, since it is larger than the sum of its proper divisors (6937133487).

12601044561 is a wasteful number, since it uses less digits than its factorization.

12601044561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 12601044561 in words is "twelve billion, six hundred one million, forty-four thousand, five hundred sixty-one".