491472504601 has 9 divisors (see below), whose sum is σ = 532196072031. Its totient is φ = 453658514712.

The previous prime is 491472504587. The next prime is 491472504631. The reversal of 491472504601 is 106405274194.

The square root of 491472504601 is 701051.

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., 72703033225 + 418769471376 = 269635^2 + 647124^2 .

It is not a de Polignac number, because 491472504601 - 2⁷ = 491472504473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491472504631) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 9086700 + ... + 9140626.

Almost surely, 2^491472504601 is an apocalyptic number.

491472504601 is the 701051-st square number.

491472504601 is the 350526-th centered octagonal number.

It is an amenable number.

491472504601 is a deficient number, since it is larger than the sum of its proper divisors (40723567430).

491472504601 is an frugal number, since it uses more digits than its factorization.

491472504601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107880 (or 53940 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

Adding to 491472504601 its reverse (106405274194), we get a palindrome (597877778795).

The spelling of 491472504601 in words is "four hundred ninety-one billion, four hundred seventy-two million, five hundred four thousand, six hundred one".