244964613721 has 3 divisors (see below), whose sum is σ = 244965108661. Its totient is φ = 244964118782.

The previous prime is 244964613653. The next prime is 244964613727. The reversal of 244964613721 is 127316469442.

The square root of 244964613721 is 494939.

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 is not a de Polignac number, because 244964613721 - 2¹¹ = 244964611673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244964613727) 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, 247470 + ... + 742408.

Almost surely, 2^244964613721 is an apocalyptic number.

244964613721 is the 494939-th square number.

244964613721 is the 247470-th centered octagonal number.

It is an amenable number.

244964613721 is a deficient number, since it is larger than the sum of its proper divisors (494940).

244964613721 is an frugal number, since it uses more digits than its factorization.

244964613721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989878 (or 494939 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

Multiplying 244964613721 by its sum of digits (49), we get a square (12003266072329 = 3464573²).

The spelling of 244964613721 in words is "two hundred forty-four billion, nine hundred sixty-four million, six hundred thirteen thousand, seven hundred twenty-one".