7543904944689 has 9 divisors (see below), whose sum is σ = 10896763488793. Its totient is φ = 5029264469892.

The previous prime is 7543904944547. The next prime is 7543904944699. The reversal of 7543904944689 is 9864494093457.

It is a happy number.

The square root of 7543904944689 is 2746617.

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

7543904944689 is a `hidden beast` number, since 7 + 5 + 4 + 3 + 90 + 494 + 46 + 8 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 7543904944689 - 2¹⁷ = 7543904813617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7543904944699) 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, 7782082 + ... + 8697620.

Almost surely, 2^{7543904944689} is an apocalyptic number.

7543904944689 is the 2746617-th square number.

7543904944689 is the 1373309-th centered octagonal number.

It is an amenable number.

7543904944689 is a deficient number, since it is larger than the sum of its proper divisors (3352858544104).

7543904944689 is an frugal number, since it uses more digits than its factorization.

7543904944689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831084 (or 915542 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 72.

The spelling of 7543904944689 in words is "seven trillion, five hundred forty-three billion, nine hundred four million, nine hundred forty-four thousand, six hundred eighty-nine".