8155796978 has 8 divisors (see below), whose sum is σ = 13981366272. Its totient is φ = 3495341556.

The previous prime is 8155796977. The next prime is 8155796981. The reversal of 8155796978 is 8796975518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (8155796977) 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, 291278450 + ... + 291278477.

It is an arithmetic number, because the mean of its divisors is an integer number (1747670784).

Almost surely, 2^8155796978 is an apocalyptic number.

8155796978 is a deficient number, since it is larger than the sum of its proper divisors (5825569294).

8155796978 is a wasteful number, since it uses less digits than its factorization.

8155796978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582556936.

The product of its digits is 38102400, while the sum is 65.

The square root of 8155796978 is about 90309.4512108229. The cubic root of 8155796978 is about 2012.8997014726.

The spelling of 8155796978 in words is "eight billion, one hundred fifty-five million, seven hundred ninety-six thousand, nine hundred seventy-eight".