8491913056 has 48 divisors (see below), whose sum is σ = 18277721280. Its totient is φ = 3851620480.

The previous prime is 8491913051. The next prime is 8491913069. The reversal of 8491913056 is 6503191948.

It is a super-2 number, since 2×8491913056² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8491912997 and 8491913015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491913051) 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, 138555 + ... + 190213.

It is an arithmetic number, because the mean of its divisors is an integer number (380785860).

Almost surely, 2^8491913056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8491913056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9138860640).

8491913056 is an abundant number, since it is smaller than the sum of its proper divisors (9785808224).

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

8491913056 is a wasteful number, since it uses less digits than its factorization.

8491913056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52147 (or 52139 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 8491913056 is about 92151.5765247671. The cubic root of 8491913056 is about 2040.1801276292.

The spelling of 8491913056 in words is "eight billion, four hundred ninety-one million, nine hundred thirteen thousand, fifty-six".