1161809376131 has 2 divisors, whose sum is σ = 1161809376132. Its totient is φ = 1161809376130.

The previous prime is 1161809376127. The next prime is 1161809376191. The reversal of 1161809376131 is 1316739081611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161809376131 - 2² = 1161809376127 is a prime.

It is a super-2 number, since 2×1161809376131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1161809376191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580904688065 + 580904688066.

It is an arithmetic number, because the mean of its divisors is an integer number (580904688066).

Almost surely, 2^{1161809376131} is an apocalyptic number.

1161809376131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161809376131 is an equidigital number, since it uses as much as digits as its factorization.

1161809376131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 1161809376131 in words is "one trillion, one hundred sixty-one billion, eight hundred nine million, three hundred seventy-six thousand, one hundred thirty-one".