5206399478 has 16 divisors (see below), whose sum is σ = 8974571424. Its totient is φ = 2218985280.

The previous prime is 5206399477. The next prime is 5206399487. The reversal of 5206399478 is 8749936025.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206399477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024775 + ... + 1029842.

It is an arithmetic number, because the mean of its divisors is an integer number (560910714).

Almost surely, 2^5206399478 is an apocalyptic number.

5206399478 is a deficient number, since it is larger than the sum of its proper divisors (3768171946).

5206399478 is a wasteful number, since it uses less digits than its factorization.

5206399478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054807.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 5206399478 is about 72155.3842620216. The cubic root of 5206399478 is about 1733.1886216547.

The spelling of 5206399478 in words is "five billion, two hundred six million, three hundred ninety-nine thousand, four hundred seventy-eight".