131756181657131 has 4 divisors (see below), whose sum is σ = 131934471484200. Its totient is φ = 131577891830064.

The previous prime is 131756181657073. The next prime is 131756181657197.

131756181657131 is nontrivially palindromic in base 10.

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 131756181657131 - 2¹⁰ = 131756181656107 is a prime.

It is a super-2 number, since 2×131756181657131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131756181657031) 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, 89144912426 + ... + 89144913903.

It is an arithmetic number, because the mean of its divisors is an integer number (32983617871050).

Almost surely, 2^{131756181657131} is an apocalyptic number.

131756181657131 is a deficient number, since it is larger than the sum of its proper divisors (178289827069).

131756181657131 is an equidigital number, since it uses as much as digits as its factorization.

131756181657131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178289827068.

The product of its digits is 3175200, while the sum is 56.

The spelling of 131756181657131 in words is "one hundred thirty-one trillion, seven hundred fifty-six billion, one hundred eighty-one million, six hundred fifty-seven thousand, one hundred thirty-one".