12523213445761 has 4 divisors (see below), whose sum is σ = 12523224595392. Its totient is φ = 12523202296132.

The previous prime is 12523213445689. The next prime is 12523213445839. The reversal of 12523213445761 is 16754431232521.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12523213445761 - 2¹⁹ = 12523212921473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12523213145761) 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, 3673981 + ... + 6208426.

It is an arithmetic number, because the mean of its divisors is an integer number (3130806148848).

Almost surely, 2^{12523213445761} is an apocalyptic number.

It is an amenable number.

12523213445761 is a deficient number, since it is larger than the sum of its proper divisors (11149631).

12523213445761 is an equidigital number, since it uses as much as digits as its factorization.

12523213445761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149630.

The product of its digits is 1209600, while the sum is 46.

The spelling of 12523213445761 in words is "twelve trillion, five hundred twenty-three billion, two hundred thirteen million, four hundred forty-five thousand, seven hundred sixty-one".