12501563361 has 32 divisors (see below), whose sum is σ = 20116899840. Its totient is φ = 6746073984.

The previous prime is 12501563357. The next prime is 12501563363. The reversal of 12501563361 is 16336510521.

It is not a de Polignac number, because 12501563361 - 2² = 12501563357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12501563363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74836 + ... + 174938.

It is an arithmetic number, because the mean of its divisors is an integer number (628653120).

Almost surely, 2^12501563361 is an apocalyptic number.

It is an amenable number.

12501563361 is a deficient number, since it is larger than the sum of its proper divisors (7615336479).

12501563361 is a wasteful number, since it uses less digits than its factorization.

12501563361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100445.

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 12501563361 in words is "twelve billion, five hundred one million, five hundred sixty-three thousand, three hundred sixty-one".