12749527129 has 4 divisors (see below), whose sum is σ = 12758339584. Its totient is φ = 12740714676.

The previous prime is 12749527121. The next prime is 12749527177. The reversal of 12749527129 is 92172594721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92172594721 = 761 ⋅121120361.

It is a cyclic number.

It is not a de Polignac number, because 12749527129 - 2³ = 12749527121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12749527121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4404057 + ... + 4406950.

It is an arithmetic number, because the mean of its divisors is an integer number (3189584896).

Almost surely, 2^12749527129 is an apocalyptic number.

It is an amenable number.

12749527129 is a deficient number, since it is larger than the sum of its proper divisors (8812455).

12749527129 is an equidigital number, since it uses as much as digits as its factorization.

12749527129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8812454.

The product of its digits is 635040, while the sum is 49.

The spelling of 12749527129 in words is "twelve billion, seven hundred forty-nine million, five hundred twenty-seven thousand, one hundred twenty-nine".