4278563645656 has 32 divisors (see below), whose sum is σ = 8262076356000. Its totient is φ = 2075665395456.

The previous prime is 4278563645641. The next prime is 4278563645663. The reversal of 4278563645656 is 6565463658724.

It is a super-2 number, since 2×4278563645656² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4278563645591 and 4278563645600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20025501 + ... + 20238028.

It is an arithmetic number, because the mean of its divisors is an integer number (258189886125).

Almost surely, 2^{4278563645656} is an apocalyptic number.

It is an amenable number.

4278563645656 is a deficient number, since it is larger than the sum of its proper divisors (3983512710344).

4278563645656 is a wasteful number, since it uses less digits than its factorization.

4278563645656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40263931 (or 40263927 counting only the distinct ones).

The product of its digits is 870912000, while the sum is 67.

The spelling of 4278563645656 in words is "four trillion, two hundred seventy-eight billion, five hundred sixty-three million, six hundred forty-five thousand, six hundred fifty-six".