491730272256 has 128 divisors (see below), whose sum is σ = 1313541597600. Its totient is φ = 163625041920.

The previous prime is 491730272233. The next prime is 491730272263. The reversal of 491730272256 is 652272037194.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60846136 + ... + 60854216.

Almost surely, 2^491730272256 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 491730272256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656770798800).

491730272256 is an abundant number, since it is smaller than the sum of its proper divisors (821811325344).

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

491730272256 is an frugal number, since it uses more digits than its factorization.

491730272256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733 (or 8705 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 491730272256 in words is "four hundred ninety-one billion, seven hundred thirty million, two hundred seventy-two thousand, two hundred fifty-six".