478166515 has 4 divisors (see below), whose sum is σ = 573799824. Its totient is φ = 382533208.

The previous prime is 478166509. The next prime is 478166551. The reversal of 478166515 is 515661874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 478166515 - 2²⁵ = 444612083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47816647 + ... + 47816656.

It is an arithmetic number, because the mean of its divisors is an integer number (143449956).

Almost surely, 2^478166515 is an apocalyptic number.

478166515 is a deficient number, since it is larger than the sum of its proper divisors (95633309).

478166515 is an equidigital number, since it uses as much as digits as its factorization.

478166515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95633308.

The product of its digits is 201600, while the sum is 43.

The square root of 478166515 is about 21867.0188868991. The cubic root of 478166515 is about 781.9753324331.

The spelling of 478166515 in words is "four hundred seventy-eight million, one hundred sixty-six thousand, five hundred fifteen".