9148128521 has 4 divisors (see below), whose sum is σ = 10455004032. Its totient is φ = 7841253012.

The previous prime is 9148128511. The next prime is 9148128527. The reversal of 9148128521 is 1258218419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9148128521 - 2¹⁴ = 9148112137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9148128527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653437745 + ... + 653437758.

It is an arithmetic number, because the mean of its divisors is an integer number (2613751008).

Almost surely, 2^9148128521 is an apocalyptic number.

It is an amenable number.

9148128521 is a deficient number, since it is larger than the sum of its proper divisors (1306875511).

9148128521 is a wasteful number, since it uses less digits than its factorization.

9148128521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306875510.

The product of its digits is 46080, while the sum is 41.

The square root of 9148128521 is about 95645.8494708474. The cubic root of 9148128521 is about 2091.4336234268.

The spelling of 9148128521 in words is "nine billion, one hundred forty-eight million, one hundred twenty-eight thousand, five hundred twenty-one".