5491257264 has 120 divisors (see below), whose sum is σ = 15778146384. Its totient is φ = 1781760000.

The previous prime is 5491257257. The next prime is 5491257293. The reversal of 5491257264 is 4627521945.

5491257264 is a `hidden beast` number, since 5 + 4 + 9 + 12 + 572 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3783739 + ... + 3785189.

Almost surely, 2^5491257264 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 5491257264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7889073192).

5491257264 is an abundant number, since it is smaller than the sum of its proper divisors (10286889120).

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

5491257264 is a wasteful number, since it uses less digits than its factorization.

5491257264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147 (or 2138 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 5491257264 is about 74103.0179142523. The cubic root of 5491257264 is about 1764.2383715386.

The spelling of 5491257264 in words is "five billion, four hundred ninety-one million, two hundred fifty-seven thousand, two hundred sixty-four".