8011886778 has 48 divisors (see below), whose sum is σ = 19856041920. Its totient is φ = 2287139328.

The previous prime is 8011886777. The next prime is 8011886863. The reversal of 8011886778 is 8776881108.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8011886777) 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 23 ways as a sum of consecutive naturals, for example, 122778 + ... + 176346.

It is an arithmetic number, because the mean of its divisors is an integer number (413667540).

Almost surely, 2^8011886778 is an apocalyptic number.

8011886778 is an abundant number, since it is smaller than the sum of its proper divisors (11844155142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8011886778 is a wasteful number, since it uses less digits than its factorization.

8011886778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54771 (or 54768 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 54.

The square root of 8011886778 is about 89509.1435441095. The cubic root of 8011886778 is about 2000.9900746286.

The spelling of 8011886778 in words is "eight billion, eleven million, eight hundred eighty-six thousand, seven hundred seventy-eight".