8491273245 has 96 divisors (see below), whose sum is σ = 18163401984. Its totient is φ = 3573504000.

The previous prime is 8491273199. The next prime is 8491273249. The reversal of 8491273245 is 5423721948.

It is not a de Polignac number, because 8491273245 - 2⁷ = 8491273117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8491273245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491273249) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1639510 + ... + 1644680.

It is an arithmetic number, because the mean of its divisors is an integer number (189202104).

Almost surely, 2^8491273245 is an apocalyptic number.

It is an amenable number.

8491273245 is an abundant number, since it is smaller than the sum of its proper divisors (9672128739).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8491273245 is a wasteful number, since it uses less digits than its factorization.

8491273245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603 (or 5600 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 8491273245 is about 92148.1049452456. The cubic root of 8491273245 is about 2040.1288881946.

The spelling of 8491273245 in words is "eight billion, four hundred ninety-one million, two hundred seventy-three thousand, two hundred forty-five".