9361809981 has 32 divisors (see below), whose sum is σ = 14054826240. Its totient is φ = 6234874560.

The previous prime is 9361809959. The next prime is 9361809983. The reversal of 9361809981 is 1899081639.

It is not a de Polignac number, because 9361809981 - 2⁵ = 9361809949 is a prime.

It is a super-2 number, since 2×9361809981² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9361809983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3303141 + ... + 3305973.

It is an arithmetic number, because the mean of its divisors is an integer number (439213320).

Almost surely, 2^9361809981 is an apocalyptic number.

It is an amenable number.

9361809981 is a deficient number, since it is larger than the sum of its proper divisors (4693016259).

9361809981 is an equidigital number, since it uses as much as digits as its factorization.

9361809981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365 (or 4347 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 9361809981 is about 96756.4467154515. The cubic root of 9361809981 is about 2107.5923197613.

The spelling of 9361809981 in words is "nine billion, three hundred sixty-one million, eight hundred nine thousand, nine hundred eighty-one".