23505645065 has 64 divisors (see below), whose sum is σ = 34504704000. Its totient is φ = 15024925440.

The previous prime is 23505645049. The next prime is 23505645067. The reversal of 23505645065 is 56054650532.

It is not a de Polignac number, because 23505645065 - 2⁴ = 23505645049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23505645067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22622816 + ... + 22623854.

It is an arithmetic number, because the mean of its divisors is an integer number (539136000).

Almost surely, 2^23505645065 is an apocalyptic number.

It is an amenable number.

23505645065 is a deficient number, since it is larger than the sum of its proper divisors (10999058935).

23505645065 is a wasteful number, since it uses less digits than its factorization.

23505645065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 23505645065 in words is "twenty-three billion, five hundred five million, six hundred forty-five thousand, sixty-five".