7485191289 has 15 divisors (see below), whose sum is σ = 11182745343. Its totient is φ = 4989608424.

The previous prime is 7485191261. The next prime is 7485191327. The reversal of 7485191289 is 9821915847.

It is a happy number.

The square root of 7485191289 is 86517.

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

7485191289 is a `hidden beast` number, since 7 + 48 + 519 + 1 + 2 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7457186025 + 28005264 = 86355^2 + 5292^2 .

It is not a de Polignac number, because 7485191289 - 2¹¹ = 7485189241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7485191249) 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, 773847 + ... + 783459.

Almost surely, 2^7485191289 is an apocalyptic number.

7485191289 is the 86517-th square number.

7485191289 is the 43259-th centered octagonal number.

It is an amenable number.

7485191289 is a deficient number, since it is larger than the sum of its proper divisors (3697554054).

7485191289 is an frugal number, since it uses more digits than its factorization.

7485191289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19238 (or 9616 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The cubic root of 7485191289 is about 1956.1446574298.

The spelling of 7485191289 in words is "seven billion, four hundred eighty-five million, one hundred ninety-one thousand, two hundred eighty-nine".