8491327851 has 8 divisors (see below), whose sum is σ = 11323977280. Its totient is φ = 5659781832.

The previous prime is 8491327847. The next prime is 8491327891. The reversal of 8491327851 is 1587231948.

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

It is not a de Polignac number, because 8491327851 - 2² = 8491327847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8491327851.

It is not an unprimeable number, because it can be changed into a prime (8491327891) 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, 257725 + ... + 288798.

It is an arithmetic number, because the mean of its divisors is an integer number (1415497160).

Almost surely, 2^8491327851 is an apocalyptic number.

8491327851 is a deficient number, since it is larger than the sum of its proper divisors (2832649429).

8491327851 is a wasteful number, since it uses less digits than its factorization.

8491327851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551705.

The product of its digits is 483840, while the sum is 48.

The square root of 8491327851 is about 92148.4012395223. The cubic root of 8491327851 is about 2040.1332614311.

The spelling of 8491327851 in words is "eight billion, four hundred ninety-one million, three hundred twenty-seven thousand, eight hundred fifty-one".