27878265803 has 4 divisors (see below), whose sum is σ = 27879168240. Its totient is φ = 27877363368.

The previous prime is 27878265769. The next prime is 27878265851. The reversal of 27878265803 is 30856287872.

It is a happy number.

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 27878265803 - 2¹⁰ = 27878264779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27878265203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403175 + ... + 467232.

It is an arithmetic number, because the mean of its divisors is an integer number (6969792060).

Almost surely, 2^27878265803 is an apocalyptic number.

27878265803 is a deficient number, since it is larger than the sum of its proper divisors (902437).

27878265803 is an equidigital number, since it uses as much as digits as its factorization.

27878265803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902436.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 27878265803 in words is "twenty-seven billion, eight hundred seventy-eight million, two hundred sixty-five thousand, eight hundred three".