9789106556 has 12 divisors (see below), whose sum is σ = 17386622568. Its totient is φ = 4821500112.

The previous prime is 9789106543. The next prime is 9789106559. The reversal of 9789106556 is 6556019879.

It is a super-2 number, since 2×9789106556² (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 (9789106559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18262991 + ... + 18263526.

It is an arithmetic number, because the mean of its divisors is an integer number (1448885214).

Almost surely, 2^9789106556 is an apocalyptic number.

It is an amenable number.

9789106556 is a deficient number, since it is larger than the sum of its proper divisors (7597516012).

9789106556 is a wasteful number, since it uses less digits than its factorization.

9789106556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36526588 (or 36526586 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 56.

The square root of 9789106556 is about 98939.9138669526. The cubic root of 9789106556 is about 2139.1817522760.

The spelling of 9789106556 in words is "nine billion, seven hundred eighty-nine million, one hundred six thousand, five hundred fifty-six".