2478216845 has 24 divisors (see below), whose sum is σ = 3225484800. Its totient is φ = 1827074496.

The previous prime is 2478216827. The next prime is 2478216847. The reversal of 2478216845 is 5486128742.

It is not a de Polignac number, because 2478216845 - 2⁶ = 2478216781 is a prime.

It is a super-2 number, since 2×2478216845² = 12283117461683508050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2478216845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478216847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 605516 + ... + 609594.

It is an arithmetic number, because the mean of its divisors is an integer number (134395200).

Almost surely, 2^2478216845 is an apocalyptic number.

It is an amenable number.

2478216845 is a deficient number, since it is larger than the sum of its proper divisors (747267955).

2478216845 is a wasteful number, since it uses less digits than its factorization.

2478216845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4816 counting only the distinct ones).

The product of its digits is 860160, while the sum is 47.

The square root of 2478216845 is about 49781.6918655845. The cubic root of 2478216845 is about 1353.2553982894.

The spelling of 2478216845 in words is "two billion, four hundred seventy-eight million, two hundred sixteen thousand, eight hundred forty-five".