9169786081 has 9 divisors (see below), whose sum is σ = 9478195923. Its totient is φ = 8871113760.

The previous prime is 9169786049. The next prime is 9169786127. The reversal of 9169786081 is 1806879619.

The square root of 9169786081 is 95759.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8425587681 + 744198400 = 91791^2 + 27280^2 .

It is not a de Polignac number, because 9169786081 - 2⁵ = 9169786049 is a prime.

It is a super-2 number, since 2×9169786081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9169786181) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2966985 + ... + 2970073.

Almost surely, 2^9169786081 is an apocalyptic number.

9169786081 is the 95759-th square number.

9169786081 is the 47880-th centered octagonal number.

It is an amenable number.

9169786081 is a deficient number, since it is larger than the sum of its proper divisors (308409842).

9169786081 is an frugal number, since it uses more digits than its factorization.

9169786081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240 (or 3120 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The cubic root of 9169786081 is about 2093.0827640675.

The spelling of 9169786081 in words is "nine billion, one hundred sixty-nine million, seven hundred eighty-six thousand, eighty-one".