12725109691 has 8 divisors (see below), whose sum is σ = 14544737280. Its totient is φ = 10905920808.

The previous prime is 12725109659. The next prime is 12725109757. The reversal of 12725109691 is 19690152721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12725109691 - 2⁵ = 12725109659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12725109641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44971 + ... + 165748.

It is an arithmetic number, because the mean of its divisors is an integer number (1818092160).

Almost surely, 2^12725109691 is an apocalyptic number.

12725109691 is a deficient number, since it is larger than the sum of its proper divisors (1819627589).

12725109691 is an equidigital number, since it uses as much as digits as its factorization.

12725109691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219353.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 12725109691 in words is "twelve billion, seven hundred twenty-five million, one hundred nine thousand, six hundred ninety-one".