201024040009 has 12 divisors (see below), whose sum is σ = 217875549276. Its totient is φ = 185391328512.

The previous prime is 201024039971. The next prime is 201024040013. The reversal of 201024040009 is 900040420102.

It can be written as a sum of positive squares in 6 ways, for example, as 14855953225 + 186168086784 = 121885^2 + 431472^2 .

It is a de Polignac number, because none of the positive numbers 2^k-201024040009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201024040099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356764 + ... + 727549.

It is an arithmetic number, because the mean of its divisors is an integer number (18156295773).

Almost surely, 2^201024040009 is an apocalyptic number.

It is an amenable number.

201024040009 is a deficient number, since it is larger than the sum of its proper divisors (16851509267).

201024040009 is a wasteful number, since it uses less digits than its factorization.

201024040009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085436 (or 1085423 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 201024040009 in words is "two hundred one billion, twenty-four million, forty thousand, nine".