12549723533856 has 192 divisors, whose sum is σ = 36820562688000. Its totient is φ = 4158448588800.

The previous prime is 12549723533833. The next prime is 12549723533869. The reversal of 12549723533856 is 65833532794521.

12549723533856 is a `hidden beast` number, since 1 + 2 + 5 + 4 + 97 + 2 + 3 + 533 + 8 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12549723533793 and 12549723533802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244374870 + ... + 244426218.

It is an arithmetic number, because the mean of its divisors is an integer number (191773764000).

Almost surely, 2^{12549723533856} is an apocalyptic number.

12549723533856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12549723533856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18410281344000).

12549723533856 is an abundant number, since it is smaller than the sum of its proper divisors (24270839154144).

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

12549723533856 is a wasteful number, since it uses less digits than its factorization.

12549723533856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53040 (or 53026 counting only the distinct ones).

The product of its digits is 163296000, while the sum is 63.

The spelling of 12549723533856 in words is "twelve trillion, five hundred forty-nine billion, seven hundred twenty-three million, five hundred thirty-three thousand, eight hundred fifty-six".