8178822946 has 12 divisors (see below), whose sum is σ = 14271211638. Its totient is φ = 3505209792.

The previous prime is 8178822937. The next prime is 8178822947. The reversal of 8178822946 is 6492288718.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7931861721 + 246961225 = 89061^2 + 15715^2 .

It is a super-2 number, since 2×8178822946² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8178822947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41728591 + ... + 41728786.

Almost surely, 2^8178822946 is an apocalyptic number.

8178822946 is a deficient number, since it is larger than the sum of its proper divisors (6092388692).

8178822946 is a wasteful number, since it uses less digits than its factorization.

8178822946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83457393 (or 83457386 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 55.

The square root of 8178822946 is about 90436.8450688103. The cubic root of 8178822946 is about 2014.7922373000.

The spelling of 8178822946 in words is "eight billion, one hundred seventy-eight million, eight hundred twenty-two thousand, nine hundred forty-six".