131866109342249 has 16 divisors (see below), whose sum is σ = 134393794410240. Its totient is φ = 129348256687440.

The previous prime is 131866109342239. The next prime is 131866109342323. The reversal of 131866109342249 is 942243901668131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131866109342249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131866109342239) 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, 200920022 + ... + 201575264.

It is an arithmetic number, because the mean of its divisors is an integer number (8399612150640).

Almost surely, 2^{131866109342249} is an apocalyptic number.

It is an amenable number.

131866109342249 is a deficient number, since it is larger than the sum of its proper divisors (2527685067991).

131866109342249 is an equidigital number, since it uses as much as digits as its factorization.

131866109342249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662740.

The product of its (nonzero) digits is 13436928, while the sum is 59.

The spelling of 131866109342249 in words is "one hundred thirty-one trillion, eight hundred sixty-six billion, one hundred nine million, three hundred forty-two thousand, two hundred forty-nine".