8161238878 has 16 divisors (see below), whose sum is σ = 13187731536. Its totient is φ = 3765528000.

The previous prime is 8161238837. The next prime is 8161238933. The reversal of 8161238878 is 8788321618.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36250 + ... + 132802.

It is an arithmetic number, because the mean of its divisors is an integer number (824233221).

Almost surely, 2^8161238878 is an apocalyptic number.

8161238878 is a deficient number, since it is larger than the sum of its proper divisors (5026492658).

8161238878 is a wasteful number, since it uses less digits than its factorization.

8161238878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99819.

The product of its digits is 1032192, while the sum is 52.

The square root of 8161238878 is about 90339.5753698234. The cubic root of 8161238878 is about 2013.3472998083.

The spelling of 8161238878 in words is "eight billion, one hundred sixty-one million, two hundred thirty-eight thousand, eight hundred seventy-eight".