8649889013 has 6 divisors (see below), whose sum is σ = 9042323094. Its totient is φ = 8273806376.

The previous prime is 8649888953. The next prime is 8649889019. The reversal of 8649889013 is 3109889468.

It can be written as a sum of positive squares in only one way, i.e., 8468232529 + 181656484 = 92023^2 + 13478^2 .

It is not a de Polignac number, because 8649889013 - 2¹² = 8649884917 is a prime.

It is a super-2 number, since 2×8649889013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8649889013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649889019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8175170 + ... + 8176227.

It is an arithmetic number, because the mean of its divisors is an integer number (1507053849).

Almost surely, 2^8649889013 is an apocalyptic number.

It is an amenable number.

8649889013 is a deficient number, since it is larger than the sum of its proper divisors (392434081).

8649889013 is a wasteful number, since it uses less digits than its factorization.

8649889013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16351443 (or 16351420 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 8649889013 is about 93004.7795169689. The cubic root of 8649889013 is about 2052.7537067047.

The spelling of 8649889013 in words is "eight billion, six hundred forty-nine million, eight hundred eighty-nine thousand, thirteen".