8491662464 has 48 divisors (see below), whose sum is σ = 17112077430. Its totient is φ = 4196978688.

The previous prime is 8491662451. The next prime is 8491662523. The reversal of 8491662464 is 4642661948.

It can be written as a sum of positive squares in only one way, i.e., 7397376064 + 1094286400 = 86008^2 + 33080^2 .

It is a super-3 number, since 3×8491662464³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10267619 + ... + 10268445.

Almost surely, 2^8491662464 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 8491662464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8556038715).

8491662464 is an abundant number, since it is smaller than the sum of its proper divisors (8620414966).

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

8491662464 is an frugal number, since it uses more digits than its factorization.

8491662464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 926 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 50.

The square root of 8491662464 is about 92150.2168418501. The cubic root of 8491662464 is about 2040.1600592086.

The spelling of 8491662464 in words is "eight billion, four hundred ninety-one million, six hundred sixty-two thousand, four hundred sixty-four".