9889416621 has 18 divisors (see below), whose sum is σ = 16616911662. Its totient is φ = 5651094960.

The previous prime is 9889416601. The next prime is 9889416659. The reversal of 9889416621 is 1266149889.

9889416621 is a `hidden beast` number, since 9 + 8 + 8 + 9 + 4 + 1 + 6 + 621 = 666.

9889416621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9210240900 + 679175721 = 95970^2 + 26061^2 .

It is not a de Polignac number, because 9889416621 - 2⁶ = 9889416557 is a prime.

It is a super-2 number, since 2×9889416621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889416601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11212050 + ... + 11212931.

It is an arithmetic number, because the mean of its divisors is an integer number (923161759).

Almost surely, 2^9889416621 is an apocalyptic number.

It is an amenable number.

9889416621 is a deficient number, since it is larger than the sum of its proper divisors (6727495041).

9889416621 is a wasteful number, since it uses less digits than its factorization.

9889416621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22425001 (or 22424991 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 9889416621 is about 99445.5460088585. The cubic root of 9889416621 is about 2146.4637467033.

The spelling of 9889416621 in words is "nine billion, eight hundred eighty-nine million, four hundred sixteen thousand, six hundred twenty-one".