8078191827 has 4 divisors (see below), whose sum is σ = 10770922440. Its totient is φ = 5385461216.

The previous prime is 8078191757. The next prime is 8078191837. The reversal of 8078191827 is 7281918708.

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 8078191827 - 2⁸ = 8078191571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8078191827.

It is not an unprimeable number, because it can be changed into a prime (8078191837) 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, 1346365302 + ... + 1346365307.

It is an arithmetic number, because the mean of its divisors is an integer number (2692730610).

Almost surely, 2^8078191827 is an apocalyptic number.

8078191827 is a deficient number, since it is larger than the sum of its proper divisors (2692730613).

8078191827 is a wasteful number, since it uses less digits than its factorization.

8078191827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692730612.

The product of its (nonzero) digits is 451584, while the sum is 51.

The square root of 8078191827 is about 89878.7618239148. The cubic root of 8078191827 is about 2006.4948710769.

The spelling of 8078191827 in words is "eight billion, seventy-eight million, one hundred ninety-one thousand, eight hundred twenty-seven".