7609728789 has 90 divisors (see below), whose sum is σ = 12767698086. Its totient is φ = 4514590080.

The previous prime is 7609728787. The next prime is 7609728793. The reversal of 7609728789 is 9878279067.

It can be written as a sum of positive squares in 9 ways, for example, as 2438680689 + 5171048100 = 49383^2 + 71910^2 .

It is not a de Polignac number, because 7609728789 - 2¹ = 7609728787 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7609728787) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 11512119 + ... + 11512779.

Almost surely, 2^7609728789 is an apocalyptic number.

It is an amenable number.

7609728789 is a deficient number, since it is larger than the sum of its proper divisors (5157969297).

7609728789 is a wasteful number, since it uses less digits than its factorization.

7609728789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The square root of 7609728789 is about 87233.7594569900. The cubic root of 7609728789 is about 1966.9337225618.

The spelling of 7609728789 in words is "seven billion, six hundred nine million, seven hundred twenty-eight thousand, seven hundred eighty-nine".