78881467744138 has 8 divisors (see below), whose sum is σ = 118941689583360. Its totient is φ = 39234237883020.

The previous prime is 78881467744109. The next prime is 78881467744153. The reversal of 78881467744138 is 83144776418887.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103247994048 + ... + 103247994811.

It is an arithmetic number, because the mean of its divisors is an integer number (14867711197920).

Almost surely, 2^{78881467744138} is an apocalyptic number.

78881467744138 is a deficient number, since it is larger than the sum of its proper divisors (40060221839222).

78881467744138 is a wasteful number, since it uses less digits than its factorization.

78881467744138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206495989052.

The product of its digits is 1618477056, while the sum is 76.

The spelling of 78881467744138 in words is "seventy-eight trillion, eight hundred eighty-one billion, four hundred sixty-seven million, seven hundred forty-four thousand, one hundred thirty-eight".