8137823778 has 24 divisors (see below), whose sum is σ = 20150802048. Its totient is φ = 2325092472.

The previous prime is 8137823773. The next prime is 8137823779. The reversal of 8137823778 is 8773287318.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8137823773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32292826 + ... + 32293077.

It is an arithmetic number, because the mean of its divisors is an integer number (839616752).

Almost surely, 2^8137823778 is an apocalyptic number.

8137823778 is an abundant number, since it is smaller than the sum of its proper divisors (12012978270).

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

8137823778 is a wasteful number, since it uses less digits than its factorization.

8137823778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64585918 (or 64585915 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 8137823778 is about 90209.8873627498. The cubic root of 8137823778 is about 2011.4199827183.

The spelling of 8137823778 in words is "eight billion, one hundred thirty-seven million, eight hundred twenty-three thousand, seven hundred seventy-eight".