131440165601 has 2 divisors, whose sum is σ = 131440165602. Its totient is φ = 131440165600.

The previous prime is 131440165553. The next prime is 131440165631. The reversal of 131440165601 is 106561044131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130141284001 + 1298881600 = 360751^2 + 36040^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440165601 - 2¹⁸ = 131439903457 is a prime.

It is not a weakly prime, because it can be changed into another prime (131440165631) 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, 65720082800 + 65720082801.

It is an arithmetic number, because the mean of its divisors is an integer number (65720082801).

Almost surely, 2^131440165601 is an apocalyptic number.

It is an amenable number.

131440165601 is a deficient number, since it is larger than the sum of its proper divisors (1).

131440165601 is an equidigital number, since it uses as much as digits as its factorization.

131440165601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 131440165601 in words is "one hundred thirty-one billion, four hundred forty million, one hundred sixty-five thousand, six hundred one".