85721585683 has 2 divisors, whose sum is σ = 85721585684. Its totient is φ = 85721585682.

The previous prime is 85721585659. The next prime is 85721585731. The reversal of 85721585683 is 38658512758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85721585683 - 2²¹ = 85719488531 is a prime.

It is not a weakly prime, because it can be changed into another prime (85721585623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42860792841 + 42860792842.

It is an arithmetic number, because the mean of its divisors is an integer number (42860792842).

Almost surely, 2^85721585683 is an apocalyptic number.

85721585683 is a deficient number, since it is larger than the sum of its proper divisors (1).

85721585683 is an equidigital number, since it uses as much as digits as its factorization.

85721585683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128000, while the sum is 58.

The spelling of 85721585683 in words is "eighty-five billion, seven hundred twenty-one million, five hundred eighty-five thousand, six hundred eighty-three".