9727555923409 has 9 divisors (see below), whose sum is σ = 9742871958939. Its totient is φ = 9712263942000.

The previous prime is 9727555923401. The next prime is 9727555923443. The reversal of 9727555923409 is 9043295557279.

The square root of 9727555923409 is 3118903.

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

It can be written as a sum of positive squares in only one way, i.e., 116762307025 + 9610793616384 = 341705^2 + 3100128^2 .

It is not a de Polignac number, because 9727555923409 - 2³ = 9727555923401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9727555923401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2342294077 + ... + 2342298229.

It is an arithmetic number, because the mean of its divisors is an integer number (1082541328771).

Almost surely, 2^{9727555923409} is an apocalyptic number.

9727555923409 is the 3118903-rd square number.

9727555923409 is the 1559452-nd centered octagonal number.

It is an amenable number.

9727555923409 is a deficient number, since it is larger than the sum of its proper divisors (15316035530).

9727555923409 is an frugal number, since it uses more digits than its factorization.

9727555923409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9808 (or 4904 counting only the distinct ones).

The product of its (nonzero) digits is 214326000, while the sum is 67.

The spelling of 9727555923409 in words is "nine trillion, seven hundred twenty-seven billion, five hundred fifty-five million, nine hundred twenty-three thousand, four hundred nine".