9001645129 has 9 divisors (see below), whose sum is σ = 9564014901. Its totient is φ = 8470618560.

The previous prime is 9001645127. The next prime is 9001645151. The reversal of 9001645129 is 9215461009.

The square root of 9001645129 is 94877.

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

It can be written as a sum of positive squares in 4 ways, for example, as 100100025 + 8901545104 = 10005^2 + 94348^2 .

It is not a de Polignac number, because 9001645129 - 2¹ = 9001645127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9001645127) 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, 1610119 + ... + 1615699.

Almost surely, 2^9001645129 is an apocalyptic number.

9001645129 is the 94877-th square number.

9001645129 is the 47439-th centered octagonal number.

It is an amenable number.

9001645129 is a deficient number, since it is larger than the sum of its proper divisors (562369772).

9001645129 is an frugal number, since it uses more digits than its factorization.

9001645129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11196 (or 5598 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The cubic root of 9001645129 is about 2080.2105563014.

The spelling of 9001645129 in words is "nine billion, one million, six hundred forty-five thousand, one hundred twenty-nine".