81760187011 has 2 divisors, whose sum is σ = 81760187012. Its totient is φ = 81760187010.

The previous prime is 81760186999. The next prime is 81760187021. The reversal of 81760187011 is 11078106718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81760187011 - 2⁹ = 81760186499 is a prime.

It is a super-2 number, since 2×81760187011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81760187021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40880093505 + 40880093506.

It is an arithmetic number, because the mean of its divisors is an integer number (40880093506).

Almost surely, 2^81760187011 is an apocalyptic number.

81760187011 is a deficient number, since it is larger than the sum of its proper divisors (1).

81760187011 is an equidigital number, since it uses as much as digits as its factorization.

81760187011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 40.

The spelling of 81760187011 in words is "eighty-one billion, seven hundred sixty million, one hundred eighty-seven thousand, eleven".