131855377061 has 2 divisors, whose sum is σ = 131855377062. Its totient is φ = 131855377060.

The previous prime is 131855377051. The next prime is 131855377103. The reversal of 131855377061 is 160773558131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131401900036 + 453477025 = 362494^2 + 21295^2 .

It is a cyclic number.

It is not a de Polignac number, because 131855377061 - 2⁶ = 131855376997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131855376997 and 131855377015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131855377051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65927688530 + 65927688531.

It is an arithmetic number, because the mean of its divisors is an integer number (65927688531).

Almost surely, 2^131855377061 is an apocalyptic number.

It is an amenable number.

131855377061 is a deficient number, since it is larger than the sum of its proper divisors (1).

131855377061 is an equidigital number, since it uses as much as digits as its factorization.

131855377061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 131855377061 in words is "one hundred thirty-one billion, eight hundred fifty-five million, three hundred seventy-seven thousand, sixty-one".