4278517425645 has 16 divisors (see below), whose sum is σ = 6865020603072. Its totient is φ = 2275411719680.

The previous prime is 4278517425643. The next prime is 4278517425667. The reversal of 4278517425645 is 5465247158724.

It is not a de Polignac number, because 4278517425645 - 2¹ = 4278517425643 is a prime.

It is a super-3 number, since 3×4278517425645³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278517425643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 404009571 + ... + 404020160.

It is an arithmetic number, because the mean of its divisors is an integer number (429063787692).

Almost surely, 2^{4278517425645} is an apocalyptic number.

It is an amenable number.

4278517425645 is a deficient number, since it is larger than the sum of its proper divisors (2586503177427).

4278517425645 is a wasteful number, since it uses less digits than its factorization.

4278517425645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808030092.

The product of its digits is 75264000, while the sum is 60.

The spelling of 4278517425645 in words is "four trillion, two hundred seventy-eight billion, five hundred seventeen million, four hundred twenty-five thousand, six hundred forty-five".