23793861611521 has 4 divisors (see below), whose sum is σ = 23793937759152. Its totient is φ = 23793785463892.

The previous prime is 23793861611503. The next prime is 23793861611537. The reversal of 23793861611521 is 12511616839732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23793861611521 - 2¹⁹ = 23793861087233 is a prime.

It is a super-2 number, since 2×23793861611521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23793861611501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37603171 + ... + 38230696.

It is an arithmetic number, because the mean of its divisors is an integer number (5948484439788).

Almost surely, 2^{23793861611521} is an apocalyptic number.

It is an amenable number.

23793861611521 is a deficient number, since it is larger than the sum of its proper divisors (76147631).

23793861611521 is an equidigital number, since it uses as much as digits as its factorization.

23793861611521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76147630.

The product of its digits is 3265920, while the sum is 55.

The spelling of 23793861611521 in words is "twenty-three trillion, seven hundred ninety-three billion, eight hundred sixty-one million, six hundred eleven thousand, five hundred twenty-one".