491109427264 has 63 divisors (see below), whose sum is σ = 981254984781. Its totient is φ = 243875616000.

The previous prime is 491109427247. The next prime is 491109427279. The reversal of 491109427264 is 462724901194.

The square root of 491109427264 is 700792.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 360470553664 + 130638873600 = 600392^2 + 361440^2 .

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, 1407190162 + ... + 1407190510.

Almost surely, 2^491109427264 is an apocalyptic number.

491109427264 is the 700792-nd square number.

It is an amenable number.

491109427264 is a deficient number, since it is larger than the sum of its proper divisors (490145557517).

491109427264 is an frugal number, since it uses more digits than its factorization.

491109427264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

Multiplying 491109427264 by its sum of digits (49), we get a square (24064361935936 = 4905544²).

The spelling of 491109427264 in words is "four hundred ninety-one billion, one hundred nine million, four hundred twenty-seven thousand, two hundred sixty-four".