131565256126099 has 4 divisors (see below), whose sum is σ = 131565332463136. Its totient is φ = 131565179789064.

The previous prime is 131565256126093. The next prime is 131565256126141. The reversal of 131565256126099 is 990621652565131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131565256126099 - 2³ = 131565256126091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131565256126091) 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, 35522139 + ... + 39050644.

It is an arithmetic number, because the mean of its divisors is an integer number (32891333115784).

Almost surely, 2^{131565256126099} is an apocalyptic number.

131565256126099 is a deficient number, since it is larger than the sum of its proper divisors (76337037).

131565256126099 is an equidigital number, since it uses as much as digits as its factorization.

131565256126099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76337036.

The product of its (nonzero) digits is 26244000, while the sum is 61.

The spelling of 131565256126099 in words is "one hundred thirty-one trillion, five hundred sixty-five billion, two hundred fifty-six million, one hundred twenty-six thousand, ninety-nine".