985436634589 has 16 divisors (see below), whose sum is σ = 1131765972480. Its totient is φ = 848578336560.

The previous prime is 985436634583. The next prime is 985436634641.

985436634589 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985436634589 is a prime.

It is a super-2 number, since 2×985436634589² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985436634583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117722 + ... + 1794484.

It is an arithmetic number, because the mean of its divisors is an integer number (70735373280).

Almost surely, 2^985436634589 is an apocalyptic number.

It is an amenable number.

985436634589 is a deficient number, since it is larger than the sum of its proper divisors (146329337891).

985436634589 is a wasteful number, since it uses less digits than its factorization.

985436634589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683760.

The product of its digits is 671846400, while the sum is 70.

The spelling of 985436634589 in words is "nine hundred eighty-five billion, four hundred thirty-six million, six hundred thirty-four thousand, five hundred eighty-nine".