12546554520 has 64 divisors (see below), whose sum is σ = 37879463520. Its totient is φ = 3324432384.

The previous prime is 12546554513. The next prime is 12546554521. The reversal of 12546554520 is 2545564521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12546554521) 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 15 ways as a sum of consecutive naturals, for example, 314137 + ... + 351816.

Almost surely, 2^12546554520 is an apocalyptic number.

12546554520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12546554520 is an abundant number, since it is smaller than the sum of its proper divisors (25332909000).

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

12546554520 is a wasteful number, since it uses less digits than its factorization.

12546554520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666124 (or 666120 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 12546554520 in words is "twelve billion, five hundred forty-six million, five hundred fifty-four thousand, five hundred twenty".