9481494891 has 16 divisors (see below), whose sum is σ = 13809962880. Its totient is φ = 5738569920.

The previous prime is 9481494857. The next prime is 9481494901. The reversal of 9481494891 is 1984941849.

It is a de Polignac number, because none of the positive numbers 2^k-9481494891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9481494821) 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, 170010 + ... + 218783.

It is an arithmetic number, because the mean of its divisors is an integer number (863122680).

Almost surely, 2^9481494891 is an apocalyptic number.

9481494891 is a deficient number, since it is larger than the sum of its proper divisors (4328467989).

9481494891 is a wasteful number, since it uses less digits than its factorization.

9481494891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389546.

The product of its digits is 2985984, while the sum is 57.

The square root of 9481494891 is about 97372.9679685281. The cubic root of 9481494891 is about 2116.5357337517.

The spelling of 9481494891 in words is "nine billion, four hundred eighty-one million, four hundred ninety-four thousand, eight hundred ninety-one".