12561500029 has 16 divisors (see below), whose sum is σ = 13576635072. Its totient is φ = 11553429888.

The previous prime is 12561500027. The next prime is 12561500041. The reversal of 12561500029 is 92000516521.

It is not a de Polignac number, because 12561500029 - 2¹ = 12561500027 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561500027) 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, 6270342 + ... + 6272344.

It is an arithmetic number, because the mean of its divisors is an integer number (848539692).

Almost surely, 2^12561500029 is an apocalyptic number.

It is an amenable number.

12561500029 is a deficient number, since it is larger than the sum of its proper divisors (1015135043).

12561500029 is a wasteful number, since it uses less digits than its factorization.

12561500029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 12561500029 in words is "twelve billion, five hundred sixty-one million, five hundred thousand, twenty-nine".