78838327838 has 8 divisors (see below), whose sum is σ = 118269917640. Its totient is φ = 39415021960.

The previous prime is 78838327823. The next prime is 78838327853. The reversal of 78838327838 is 83872383887.

It is an interprime number because it is at equal distance from previous prime (78838327823) and next prime (78838327853).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047133 + ... + 2085288.

It is an arithmetic number, because the mean of its divisors is an integer number (14783739705).

Almost surely, 2^78838327838 is an apocalyptic number.

78838327838 is a deficient number, since it is larger than the sum of its proper divisors (39431589802).

78838327838 is a wasteful number, since it uses less digits than its factorization.

78838327838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141962.

The product of its digits is 86704128, while the sum is 65.

The spelling of 78838327838 in words is "seventy-eight billion, eight hundred thirty-eight million, three hundred twenty-seven thousand, eight hundred thirty-eight".