8391740989331 has 16 divisors (see below), whose sum is σ = 9750137518080. Its totient is φ = 7073748934560.

The previous prime is 8391740989279. The next prime is 8391740989363. The reversal of 8391740989331 is 1339890471938.

It is a de Polignac number, because none of the positive numbers 2^k-8391740989331 is a prime.

It is a super-2 number, since 2×8391740989331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8391740989531) 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, 21068171 + ... + 21462788.

It is an arithmetic number, because the mean of its divisors is an integer number (609383594880).

Almost surely, 2^{8391740989331} is an apocalyptic number.

8391740989331 is a deficient number, since it is larger than the sum of its proper divisors (1358396528749).

8391740989331 is a wasteful number, since it uses less digits than its factorization.

8391740989331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42531434.

The product of its (nonzero) digits is 35271936, while the sum is 65.

The spelling of 8391740989331 in words is "eight trillion, three hundred ninety-one billion, seven hundred forty million, nine hundred eighty-nine thousand, three hundred thirty-one".