985435128881 has 16 divisors (see below), whose sum is σ = 1131112367616. Its totient is φ = 840990560256.

The previous prime is 985435128833. The next prime is 985435128893. The reversal of 985435128881 is 188821534589.

It is not a de Polignac number, because 985435128881 - 2²² = 985430934577 is a prime.

It is a super-2 number, since 2×985435128881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (985435118881) 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, 1274225 + ... + 1895921.

It is an arithmetic number, because the mean of its divisors is an integer number (70694522976).

Almost surely, 2^985435128881 is an apocalyptic number.

It is an amenable number.

985435128881 is a deficient number, since it is larger than the sum of its proper divisors (145677238735).

985435128881 is a wasteful number, since it uses less digits than its factorization.

985435128881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622688.

The product of its digits is 22118400, while the sum is 62.

The spelling of 985435128881 in words is "nine hundred eighty-five billion, four hundred thirty-five million, one hundred twenty-eight thousand, eight hundred eighty-one".