12555493547 has 4 divisors (see below), whose sum is σ = 12555720216. Its totient is φ = 12555266880.

The previous prime is 12555493541. The next prime is 12555493549. The reversal of 12555493547 is 74539455521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74539455521 = 11689 ⋅6376889.

It is a cyclic number.

It is not a de Polignac number, because 12555493547 - 2²⁴ = 12538716331 is a prime.

It is a super-3 number, since 3×12555493547³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12555493495 and 12555493504.

It is not an unprimeable number, because it can be changed into a prime (12555493541) 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, 31163 + ... + 161499.

It is an arithmetic number, because the mean of its divisors is an integer number (3138930054).

Almost surely, 2^12555493547 is an apocalyptic number.

12555493547 is a deficient number, since it is larger than the sum of its proper divisors (226669).

12555493547 is an equidigital number, since it uses as much as digits as its factorization.

12555493547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226668.

The product of its digits is 3780000, while the sum is 50.

The spelling of 12555493547 in words is "twelve billion, five hundred fifty-five million, four hundred ninety-three thousand, five hundred forty-seven".