71853786643 has 2 divisors, whose sum is σ = 71853786644. Its totient is φ = 71853786642.

The previous prime is 71853786629. The next prime is 71853786647. The reversal of 71853786643 is 34668735817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71853786643 - 2⁹ = 71853786131 is a prime.

It is not a weakly prime, because it can be changed into another prime (71853786647) 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, 35926893321 + 35926893322.

It is an arithmetic number, because the mean of its divisors is an integer number (35926893322).

Almost surely, 2^71853786643 is an apocalyptic number.

71853786643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71853786643 is an equidigital number, since it uses as much as digits as its factorization.

71853786643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 58.

The spelling of 71853786643 in words is "seventy-one billion, eight hundred fifty-three million, seven hundred eighty-six thousand, six hundred forty-three".