9672044020081 has 15 divisors (see below), whose sum is σ = 10113401072281. Its totient is φ = 9249946711588.

The previous prime is 9672044020073. The next prime is 9672044020139. The reversal of 9672044020081 is 1800204402769.

The square root of 9672044020081 is 3109991.

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

It is not a de Polignac number, because 9672044020081 - 2³ = 9672044020073 is a prime.

It is a super-2 number, since 2×9672044020081² (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 (9672044620081) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1645182300 + ... + 1645188178.

Almost surely, 2^{9672044020081} is an apocalyptic number.

9672044020081 is the 3109991-st square number.

9672044020081 is the 1554996-th centered octagonal number.

It is an amenable number.

9672044020081 is a deficient number, since it is larger than the sum of its proper divisors (441357052200).

9672044020081 is an frugal number, since it uses more digits than its factorization.

9672044020081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11850 (or 5902 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 9672044020081 in words is "nine trillion, six hundred seventy-two billion, forty-four million, twenty thousand, eighty-one".