9658798891 has 16 divisors (see below), whose sum is σ = 11199306240. Its totient is φ = 8158570560.

The previous prime is 9658798823. The next prime is 9658798921. The reversal of 9658798891 is 1988978569.

It is not a de Polignac number, because 9658798891 - 2⁷ = 9658798763 is a prime.

It is a super-3 number, since 3×9658798891³ (a number of 31 digits) contains 333 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 9658798891.

It is not an unprimeable number, because it can be changed into a prime (9658798801) 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, 1751160 + ... + 1756666.

It is an arithmetic number, because the mean of its divisors is an integer number (699956640).

Almost surely, 2^9658798891 is an apocalyptic number.

9658798891 is a deficient number, since it is larger than the sum of its proper divisors (1540507349).

9658798891 is a wasteful number, since it uses less digits than its factorization.

9658798891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114.

The product of its digits is 78382080, while the sum is 70.

The square root of 9658798891 is about 98279.1884938007. The cubic root of 9658798891 is about 2129.6474168611.

The spelling of 9658798891 in words is "nine billion, six hundred fifty-eight million, seven hundred ninety-eight thousand, eight hundred ninety-one".