9849905881 has 16 divisors (see below), whose sum is σ = 10478160000. Its totient is φ = 9232880256.

The previous prime is 9849905873. The next prime is 9849905909. The reversal of 9849905881 is 1885099489.

It is a cyclic number.

It is not a de Polignac number, because 9849905881 - 2³ = 9849905873 is a prime.

It is a super-2 number, since 2×9849905881² (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 (9849905801) 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, 1672500 + ... + 1678378.

It is an arithmetic number, because the mean of its divisors is an integer number (654885000).

Almost surely, 2^9849905881 is an apocalyptic number.

It is an amenable number.

9849905881 is a deficient number, since it is larger than the sum of its proper divisors (628254119).

9849905881 is a wasteful number, since it uses less digits than its factorization.

9849905881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The square root of 9849905881 is about 99246.6920405915. The cubic root of 9849905881 is about 2143.6013747585.

The spelling of 9849905881 in words is "nine billion, eight hundred forty-nine million, nine hundred five thousand, eight hundred eighty-one".