9823328739961 has 27 divisors (see below), whose sum is σ = 10838205925029. Its totient is φ = 8896794053400.

The previous prime is 9823328739947. The next prime is 9823328740123. The reversal of 9823328739961 is 1699378233289.

The square root of 9823328739961 is 3134219.

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

It is not a de Polignac number, because 9823328739961 - 2¹¹ = 9823328737913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9823328719961) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17203727806 + ... + 17203728376.

Almost surely, 2^{9823328739961} is an apocalyptic number.

9823328739961 is the 3134219-th square number.

9823328739961 is the 1567110-th centered octagonal number.

It is an amenable number.

9823328739961 is a deficient number, since it is larger than the sum of its proper divisors (1014877185068).

9823328739961 is an frugal number, since it uses more digits than its factorization.

9823328739961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 1081 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 70.

The spelling of 9823328739961 in words is "nine trillion, eight hundred twenty-three billion, three hundred twenty-eight million, seven hundred thirty-nine thousand, nine hundred sixty-one".