8178275978 has 16 divisors (see below), whose sum is σ = 12485665896. Its totient is φ = 4016571840.

The previous prime is 8178275977. The next prime is 8178275981. The reversal of 8178275978 is 8795728718.

It can be written as a sum of positive squares in 4 ways, for example, as 6487174849 + 1691101129 = 80543^2 + 41123^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8178275978.

It is not an unprimeable number, because it can be changed into a prime (8178275971) 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, 43700 + ... + 135152.

Almost surely, 2^8178275978 is an apocalyptic number.

8178275978 is a deficient number, since it is larger than the sum of its proper divisors (4307389918).

8178275978 is a wasteful number, since it uses less digits than its factorization.

8178275978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92249.

The product of its digits is 15805440, while the sum is 62.

The square root of 8178275978 is about 90433.8209852929. The cubic root of 8178275978 is about 2014.7473224651.

The spelling of 8178275978 in words is "eight billion, one hundred seventy-eight million, two hundred seventy-five thousand, nine hundred seventy-eight".