12533576637420 has 72 divisors (see below), whose sum is σ = 38189002540416. Its totient is φ = 3327299258112.

The previous prime is 12533576637383. The next prime is 12533576637431. The reversal of 12533576637420 is 2473667533521.

12533576637420 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 3 + 576 + 63 + 7 + 4 + 2 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156083137 + ... + 156163416.

Almost surely, 2^{12533576637420} is an apocalyptic number.

12533576637420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12533576637420 is an abundant number, since it is smaller than the sum of its proper divisors (25655425902996).

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

12533576637420 is a wasteful number, since it uses less digits than its factorization.

12533576637420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312246791 (or 312246786 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 54.

The spelling of 12533576637420 in words is "twelve trillion, five hundred thirty-three billion, five hundred seventy-six million, six hundred thirty-seven thousand, four hundred twenty".