71765013211 has 2 divisors, whose sum is σ = 71765013212. Its totient is φ = 71765013210.

The previous prime is 71765013191. The next prime is 71765013223. The reversal of 71765013211 is 11231056717.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71765013211 - 2²¹ = 71762916059 is a prime.

It is not a weakly prime, because it can be changed into another prime (71765013251) 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, 35882506605 + 35882506606.

It is an arithmetic number, because the mean of its divisors is an integer number (35882506606).

Almost surely, 2^71765013211 is an apocalyptic number.

71765013211 is a deficient number, since it is larger than the sum of its proper divisors (1).

71765013211 is an equidigital number, since it uses as much as digits as its factorization.

71765013211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 34.

Adding to 71765013211 its reverse (11231056717), we get a palindrome (82996069928).

The spelling of 71765013211 in words is "seventy-one billion, seven hundred sixty-five million, thirteen thousand, two hundred eleven".