12523217454 has 48 divisors (see below), whose sum is σ = 29957001984. Its totient is φ = 3749187600.

The previous prime is 12523217437. The next prime is 12523217479. The reversal of 12523217454 is 45471232521.

12523217454 is a `hidden beast` number, since 12 + 523 + 2 + 1 + 74 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364582 + ... + 397449.

It is an arithmetic number, because the mean of its divisors is an integer number (624104208).

Almost surely, 2^12523217454 is an apocalyptic number.

12523217454 is an abundant number, since it is smaller than the sum of its proper divisors (17433784530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12523217454 is a wasteful number, since it uses less digits than its factorization.

12523217454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762133 (or 762130 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

Adding to 12523217454 its reverse (45471232521), we get a palindrome (57994449975).

The spelling of 12523217454 in words is "twelve billion, five hundred twenty-three million, two hundred seventeen thousand, four hundred fifty-four".