2768478515 has 16 divisors (see below), whose sum is σ = 3625606656. Its totient is φ = 2012652000.

The previous prime is 2768478511. The next prime is 2768478521. The reversal of 2768478515 is 5158748672.

It is not a de Polignac number, because 2768478515 - 2² = 2768478511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2768478511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157940 + ... + 174590.

It is an arithmetic number, because the mean of its divisors is an integer number (226600416).

Almost surely, 2^2768478515 is an apocalyptic number.

2768478515 is a deficient number, since it is larger than the sum of its proper divisors (857128141).

2768478515 is a wasteful number, since it uses less digits than its factorization.

2768478515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19690.

The product of its digits is 3763200, while the sum is 53.

The square root of 2768478515 is about 52616.3331580603. Note that the first 3 decimals coincide. The cubic root of 2768478515 is about 1404.1506946891.

The spelling of 2768478515 in words is "two billion, seven hundred sixty-eight million, four hundred seventy-eight thousand, five hundred fifteen".