38678422515778 has 8 divisors (see below), whose sum is σ = 58615753709772. Its totient is φ = 19139837945856.

The previous prime is 38678422515773. The next prime is 38678422515793. The reversal of 38678422515778 is 87751522487683.

It can be written as a sum of positive squares in 2 ways, for example, as 36550403850249 + 2128018665529 = 6045693^2 + 1458773^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 38678422515778.

It is not an unprimeable number, because it can be changed into a prime (38678422515773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99686655775 + ... + 99686656162.

Almost surely, 2^{38678422515778} is an apocalyptic number.

38678422515778 is a deficient number, since it is larger than the sum of its proper divisors (19937331193994).

38678422515778 is a wasteful number, since it uses less digits than its factorization.

38678422515778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199373312036.

The product of its digits is 1264435200, while the sum is 73.

The spelling of 38678422515778 in words is "thirty-eight trillion, six hundred seventy-eight billion, four hundred twenty-two million, five hundred fifteen thousand, seven hundred seventy-eight".