9681394912036 has 81 divisors (see below), whose sum is σ = 17574426859899. Its totient is φ = 4666568917296.

The previous prime is 9681394912031. The next prime is 9681394912051. The reversal of 9681394912036 is 6302194931869.

The square root of 9681394912036 is 3111494.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9681394912031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 23105954235 + ... + 23105954653.

Almost surely, 2^{9681394912036} is an apocalyptic number.

9681394912036 is the 3111494-th square number.

It is an amenable number.

9681394912036 is a deficient number, since it is larger than the sum of its proper divisors (7893031947863).

9681394912036 is an frugal number, since it uses more digits than its factorization.

9681394912036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 61.

The spelling of 9681394912036 in words is "nine trillion, six hundred eighty-one billion, three hundred ninety-four million, nine hundred twelve thousand, thirty-six".