78195714338 has 32 divisors (see below), whose sum is σ = 140439318528. Its totient is φ = 31947339600.

The previous prime is 78195714329. The next prime is 78195714353. The reversal of 78195714338 is 83341759187.

It is a happy number.

It is a super-2 number, since 2×78195714338² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1315508 + ... + 1373663.

It is an arithmetic number, because the mean of its divisors is an integer number (4388728704).

Almost surely, 2^78195714338 is an apocalyptic number.

78195714338 is a deficient number, since it is larger than the sum of its proper divisors (62243604190).

78195714338 is a wasteful number, since it uses less digits than its factorization.

78195714338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689278.

The product of its digits is 5080320, while the sum is 56.

The spelling of 78195714338 in words is "seventy-eight billion, one hundred ninety-five million, seven hundred fourteen thousand, three hundred thirty-eight".