985881497881 has 24 divisors (see below), whose sum is σ = 1157569495776. Its totient is φ = 837161801280.

The previous prime is 985881497863. The next prime is 985881497899. The reversal of 985881497881 is 188794188589.

985881497881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (985881497863) and next prime (985881497899).

It is not a de Polignac number, because 985881497881 - 2¹⁹ = 985880973593 is a prime.

It is a super-2 number, since 2×985881497881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985881497798 and 985881497807.

It is not an unprimeable number, because it can be changed into a prime (985881477881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3146530 + ... + 3445636.

It is an arithmetic number, because the mean of its divisors is an integer number (48232062324).

Almost surely, 2^985881497881 is an apocalyptic number.

It is an amenable number.

985881497881 is a deficient number, since it is larger than the sum of its proper divisors (171687997895).

985881497881 is a wasteful number, since it uses less digits than its factorization.

985881497881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299749 (or 299742 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 76.

The spelling of 985881497881 in words is "nine hundred eighty-five billion, eight hundred eighty-one million, four hundred ninety-seven thousand, eight hundred eighty-one".