487973799236641 has 3 divisors (see below), whose sum is σ = 487973821326771. Its totient is φ = 487973777146512.

The previous prime is 487973799236597. The next prime is 487973799236663. The reversal of 487973799236641 is 146632997379784.

The square root of 487973799236641 is 22090129.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 69386750876641 + 418587048360000 = 8329871^2 + 20459400^2 .

It is not a de Polignac number, because 487973799236641 - 2¹³ = 487973799228449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487973799276641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11045065 + ... + 33135193.

It is an arithmetic number, because the mean of its divisors is an integer number (162657940442257).

Almost surely, 2^{487973799236641} is an apocalyptic number.

487973799236641 is the 22090129-th square number.

487973799236641 is the 11045065-th centered octagonal number.

It is an amenable number.

487973799236641 is a deficient number, since it is larger than the sum of its proper divisors (22090130).

487973799236641 is an frugal number, since it uses more digits than its factorization.

487973799236641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44180258 (or 22090129 counting only the distinct ones).

The product of its digits is 20739898368, while the sum is 85.

The spelling of 487973799236641 in words is "four hundred eighty-seven trillion, nine hundred seventy-three billion, seven hundred ninety-nine million, two hundred thirty-six thousand, six hundred forty-one".