985091819713 has 4 divisors (see below), whose sum is σ = 985093804800. Its totient is φ = 985089834628.

The previous prime is 985091819707. The next prime is 985091819753. The reversal of 985091819713 is 317918190589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 985091819713 - 2⁵ = 985091819681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985091819753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485688 + ... + 1485286.

It is an arithmetic number, because the mean of its divisors is an integer number (246273451200).

Almost surely, 2^985091819713 is an apocalyptic number.

It is an amenable number.

985091819713 is a deficient number, since it is larger than the sum of its proper divisors (1985087).

985091819713 is an equidigital number, since it uses as much as digits as its factorization.

985091819713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985086.

The product of its (nonzero) digits is 4898880, while the sum is 61.

The spelling of 985091819713 in words is "nine hundred eighty-five billion, ninety-one million, eight hundred nineteen thousand, seven hundred thirteen".