985072181771 has 2 divisors, whose sum is σ = 985072181772. Its totient is φ = 985072181770.

The previous prime is 985072181747. The next prime is 985072181839. The reversal of 985072181771 is 177181270589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985072181771 - 2¹⁰ = 985072180747 is a prime.

It is not a weakly prime, because it can be changed into another prime (985072181671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492536090885 + 492536090886.

It is an arithmetic number, because the mean of its divisors is an integer number (492536090886).

Almost surely, 2^985072181771 is an apocalyptic number.

985072181771 is a deficient number, since it is larger than the sum of its proper divisors (1).

985072181771 is an equidigital number, since it uses as much as digits as its factorization.

985072181771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 56.

The spelling of 985072181771 in words is "nine hundred eighty-five billion, seventy-two million, one hundred eighty-one thousand, seven hundred seventy-one".