12578147022447 has 12 divisors (see below), whose sum is σ = 18168513253800. Its totient is φ = 8385395041008.

The previous prime is 12578147022439. The next prime is 12578147022449. The reversal of 12578147022447 is 74422074187521.

12578147022447 is a `hidden beast` number, since 1 + 2 + 57 + 8 + 147 + 0 + 2 + 2 + 447 = 666.

It is not a de Polignac number, because 12578147022447 - 2³ = 12578147022439 is a prime.

It is a super-3 number, since 3×12578147022447³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12578147022393 and 12578147022402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578147022449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 740697 + ... + 5070002.

It is an arithmetic number, because the mean of its divisors is an integer number (1514042771150).

Almost surely, 2^{12578147022447} is an apocalyptic number.

12578147022447 is a deficient number, since it is larger than the sum of its proper divisors (5590366231353).

12578147022447 is a wasteful number, since it uses less digits than its factorization.

12578147022447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051222 (or 6051219 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 54.

The spelling of 12578147022447 in words is "twelve trillion, five hundred seventy-eight billion, one hundred forty-seven million, twenty-two thousand, four hundred forty-seven".