12895506191 has 4 divisors (see below), whose sum is σ = 12896097000. Its totient is φ = 12894915384.

The previous prime is 12895506157. The next prime is 12895506203. The reversal of 12895506191 is 19160559821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12895506191 is a prime.

It is a super-3 number, since 3×12895506191³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12895506121) 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, 261356 + ... + 306753.

It is an arithmetic number, because the mean of its divisors is an integer number (3224024250).

Almost surely, 2^12895506191 is an apocalyptic number.

12895506191 is a deficient number, since it is larger than the sum of its proper divisors (590809).

12895506191 is an equidigital number, since it uses as much as digits as its factorization.

12895506191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590808.

The product of its (nonzero) digits is 194400, while the sum is 47.

The spelling of 12895506191 in words is "twelve billion, eight hundred ninety-five million, five hundred six thousand, one hundred ninety-one".