323640240165 has 24 divisors (see below), whose sum is σ = 611974273248. Its totient is φ = 156916479840.

The previous prime is 323640240139. The next prime is 323640240167. The reversal of 323640240165 is 561042046323.

323640240165 is a `hidden beast` number, since 3 + 2 + 3 + 640 + 2 + 4 + 0 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 323640240165 - 2¹⁶ = 323640174629 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 (323640240167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326908839 + ... + 326909828.

It is an arithmetic number, because the mean of its divisors is an integer number (25498928052).

Almost surely, 2^323640240165 is an apocalyptic number.

It is an amenable number.

323640240165 is a deficient number, since it is larger than the sum of its proper divisors (288334033083).

323640240165 is a wasteful number, since it uses less digits than its factorization.

323640240165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653818689 (or 653818686 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 323640240165 its reverse (561042046323), we get a palindrome (884682286488).

The spelling of 323640240165 in words is "three hundred twenty-three billion, six hundred forty million, two hundred forty thousand, one hundred sixty-five".