7522381791 has 20 divisors (see below), whose sum is σ = 11261569704. Its totient is φ = 5004018000.

The previous prime is 7522381781. The next prime is 7522381813. The reversal of 7522381791 is 1971832257.

7522381791 is a `hidden beast` number, since 7 + 522 + 38 + 1 + 7 + 91 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-7522381791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7522381721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63385 + ... + 138066.

Almost surely, 2^7522381791 is an apocalyptic number.

7522381791 is a deficient number, since it is larger than the sum of its proper divisors (3739187913).

7522381791 is a wasteful number, since it uses less digits than its factorization.

7522381791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201924 (or 201915 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 7522381791 is about 86731.6654457874. The cubic root of 7522381791 is about 1959.3790368544.

The spelling of 7522381791 in words is "seven billion, five hundred twenty-two million, three hundred eighty-one thousand, seven hundred ninety-one".