9338778681678 has 32 divisors (see below), whose sum is σ = 20774895657120. Its totient is φ = 3109618105920.

The previous prime is 9338778681653. The next prime is 9338778681731. The reversal of 9338778681678 is 8761868778339.

9338778681678 is a `hidden beast` number, since 9 + 3 + 387 + 78 + 6 + 8 + 167 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9338778681597 and 9338778681606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91840975 + ... + 91942602.

It is an arithmetic number, because the mean of its divisors is an integer number (649215489285).

Almost surely, 2^{9338778681678} is an apocalyptic number.

9338778681678 is an abundant number, since it is smaller than the sum of its proper divisors (11436116975442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9338778681678 is a wasteful number, since it uses less digits than its factorization.

9338778681678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183784529 (or 183784523 counting only the distinct ones).

The product of its digits is 4096770048, while the sum is 81.

The spelling of 9338778681678 in words is "nine trillion, three hundred thirty-eight billion, seven hundred seventy-eight million, six hundred eighty-one thousand, six hundred seventy-eight".