8491761289393 has 8 divisors (see below), whose sum is σ = 8497861246368. Its totient is φ = 8485663520544.

The previous prime is 8491761289391. The next prime is 8491761289421. The reversal of 8491761289393 is 3939821671948.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8491761289393 - 2¹ = 8491761289391 is a prime.

It is a super-2 number, since 2×8491761289393² (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 (8491761289391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7257346 + ... + 8345812.

It is an arithmetic number, because the mean of its divisors is an integer number (1062232655796).

Almost surely, 2^{8491761289393} is an apocalyptic number.

It is an amenable number.

8491761289393 is a deficient number, since it is larger than the sum of its proper divisors (6099956975).

8491761289393 is a wasteful number, since it uses less digits than its factorization.

8491761289393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094063.

The product of its digits is 141087744, while the sum is 70.

The spelling of 8491761289393 in words is "eight trillion, four hundred ninety-one billion, seven hundred sixty-one million, two hundred eighty-nine thousand, three hundred ninety-three".