8122141778 has 8 divisors (see below), whose sum is σ = 12186614268. Its totient is φ = 4059937024.

The previous prime is 8122141771. The next prime is 8122141789. The reversal of 8122141778 is 8771412218.

It can be written as a sum of positive squares in 2 ways, for example, as 7634041129 + 488100649 = 87373^2 + 22093^2 .

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 (8122141771) 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, 557951 + ... + 572322.

Almost surely, 2^8122141778 is an apocalyptic number.

8122141778 is a deficient number, since it is larger than the sum of its proper divisors (4064472490).

8122141778 is a wasteful number, since it uses less digits than its factorization.

8122141778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133868.

The product of its digits is 50176, while the sum is 41.

The square root of 8122141778 is about 90122.9259289777. The cubic root of 8122141778 is about 2010.1271157119.

The spelling of 8122141778 in words is "eight billion, one hundred twenty-two million, one hundred forty-one thousand, seven hundred seventy-eight".