131195728809 has 16 divisors (see below), whose sum is σ = 195782763840. Its totient is φ = 86825394720.

The previous prime is 131195728801. The next prime is 131195728813. The reversal of 131195728809 is 908827591131.

It is not a de Polignac number, because 131195728809 - 2³ = 131195728801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131195728801) 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, 17730247 + ... + 17737644.

It is an arithmetic number, because the mean of its divisors is an integer number (12236422740).

Almost surely, 2^131195728809 is an apocalyptic number.

It is an amenable number.

131195728809 is a deficient number, since it is larger than the sum of its proper divisors (64587035031).

131195728809 is a wasteful number, since it uses less digits than its factorization.

131195728809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35468037 (or 35468031 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 131195728809 in words is "one hundred thirty-one billion, one hundred ninety-five million, seven hundred twenty-eight thousand, eight hundred nine".