9800399652481 has 3 divisors (see below), whose sum is σ = 9800402783041. Its totient is φ = 9800396521922.

The previous prime is 9800399652473. The next prime is 9800399652503. The reversal of 9800399652481 is 1842569930089.

The square root of 9800399652481 is 3130559.

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 9800399652481 - 2³ = 9800399652473 is a prime.

It is a super-2 number, since 2×9800399652481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9800399658481) 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, 1565280 + ... + 4695838.

Almost surely, 2^{9800399652481} is an apocalyptic number.

9800399652481 is the 3130559-th square number.

9800399652481 is the 1565280-th centered octagonal number.

It is an amenable number.

9800399652481 is a deficient number, since it is larger than the sum of its proper divisors (3130560).

9800399652481 is an frugal number, since it uses more digits than its factorization.

9800399652481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261118 (or 3130559 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 64.

Multiplying 9800399652481 by its sum of digits (64), we get a square (627225577758784 = 25044472²).

The spelling of 9800399652481 in words is "nine trillion, eight hundred billion, three hundred ninety-nine million, six hundred fifty-two thousand, four hundred eighty-one".