23009781060865 has 4 divisors (see below), whose sum is σ = 27611737273044. Its totient is φ = 18407824848688.

The previous prime is 23009781060863. The next prime is 23009781060887. The reversal of 23009781060865 is 56806018790032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12511189597456 + 10498591463409 = 3537116^2 + 3240153^2 .

It is a cyclic number.

It is not a de Polignac number, because 23009781060865 - 2¹ = 23009781060863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23009781060863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300978106082 + ... + 2300978106091.

It is an arithmetic number, because the mean of its divisors is an integer number (6902934318261).

Almost surely, 2^{23009781060865} is an apocalyptic number.

It is an amenable number.

23009781060865 is a deficient number, since it is larger than the sum of its proper divisors (4601956212179).

23009781060865 is an equidigital number, since it uses as much as digits as its factorization.

23009781060865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601956212178.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 23009781060865 in words is "twenty-three trillion, nine billion, seven hundred eighty-one million, sixty thousand, eight hundred sixty-five".