8167977838 has 4 divisors (see below), whose sum is σ = 12251966760. Its totient is φ = 4083988918.

The previous prime is 8167977799. The next prime is 8167977841. The reversal of 8167977838 is 8387797618.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8167977838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041994458 + ... + 2041994461.

It is an arithmetic number, because the mean of its divisors is an integer number (3062991690).

Almost surely, 2^8167977838 is an apocalyptic number.

8167977838 is a deficient number, since it is larger than the sum of its proper divisors (4083988922).

8167977838 is a wasteful number, since it uses less digits than its factorization.

8167977838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083988921.

The product of its digits is 28449792, while the sum is 64.

The square root of 8167977838 is about 90376.8656128326. The cubic root of 8167977838 is about 2013.9013061457.

The spelling of 8167977838 in words is "eight billion, one hundred sixty-seven million, nine hundred seventy-seven thousand, eight hundred thirty-eight".