4779815217 has 24 divisors (see below), whose sum is σ = 6776880096. Its totient is φ = 2996064768.

The previous prime is 4779815213. The next prime is 4779815273. The reversal of 4779815217 is 7125189774.

It is not a de Polignac number, because 4779815217 - 2² = 4779815213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 4779815217.

It is not an unprimeable number, because it can be changed into a prime (4779815213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1110213 + ... + 1114509.

It is an arithmetic number, because the mean of its divisors is an integer number (282370004).

Almost surely, 2^4779815217 is an apocalyptic number.

It is an amenable number.

4779815217 is a deficient number, since it is larger than the sum of its proper divisors (1997064879).

4779815217 is a wasteful number, since it uses less digits than its factorization.

4779815217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617 (or 5600 counting only the distinct ones).

The product of its digits is 987840, while the sum is 51.

The square root of 4779815217 is about 69136.2077134695. The cubic root of 4779815217 is about 1684.4974938204.

The spelling of 4779815217 in words is "four billion, seven hundred seventy-nine million, eight hundred fifteen thousand, two hundred seventeen".