23313561336721 has 4 divisors (see below), whose sum is σ = 23462055358132. Its totient is φ = 23165067315312.

The previous prime is 23313561336683. The next prime is 23313561336773. The reversal of 23313561336721 is 12763316531332.

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 2466218976400 + 20847342360321 = 1570420^2 + 4565889^2 .

It is a cyclic number.

It is not a de Polignac number, because 23313561336721 - 2²¹ = 23313559239569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23313561336521) 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, 74247010470 + ... + 74247010783.

It is an arithmetic number, because the mean of its divisors is an integer number (5865513839533).

Almost surely, 2^{23313561336721} is an apocalyptic number.

It is an amenable number.

23313561336721 is a deficient number, since it is larger than the sum of its proper divisors (148494021411).

23313561336721 is a wasteful number, since it uses less digits than its factorization.

23313561336721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148494021410.

The product of its digits is 1224720, while the sum is 46.

The spelling of 23313561336721 in words is "twenty-three trillion, three hundred thirteen billion, five hundred sixty-one million, three hundred thirty-six thousand, seven hundred twenty-one".