8491390562 has 18 divisors (see below), whose sum is σ = 13319651457. Its totient is φ = 4059666336.

The previous prime is 8491390553. The next prime is 8491390577. The reversal of 8491390562 is 2650931948.

It can be written as a sum of positive squares in 2 ways, for example, as 8392208881 + 99181681 = 91609^2 + 9959^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=65159.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2995898 + ... + 2998730.

Almost surely, 2^8491390562 is an apocalyptic number.

8491390562 is a deficient number, since it is larger than the sum of its proper divisors (4828260895).

8491390562 is an frugal number, since it uses more digits than its factorization.

8491390562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714 (or 2858 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 8491390562 is about 92148.7415106685. The cubic root of 8491390562 is about 2040.1382837505.

The spelling of 8491390562 in words is "eight billion, four hundred ninety-one million, three hundred ninety thousand, five hundred sixty-two".