1678784178768 has 40 divisors (see below), whose sum is σ = 4342558118016. Its totient is φ = 558859372800.

The previous prime is 1678784178767. The next prime is 1678784178769. The reversal of 1678784178768 is 8678714878761.

It is an interprime number because it is at equal distance from previous prime (1678784178767) and next prime (1678784178769).

It is a junction number, because it is equal to n+sod(n) for n = 1678784178693 and 1678784178702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678784178763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22942888 + ... + 23015943.

Almost surely, 2^{1678784178768} is an apocalyptic number.

It is an amenable number.

1678784178768 is an abundant number, since it is smaller than the sum of its proper divisors (2663773939248).

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

1678784178768 is a wasteful number, since it uses less digits than its factorization.

1678784178768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45959603 (or 45959597 counting only the distinct ones).

The product of its digits is 1416167424, while the sum is 78.

The spelling of 1678784178768 in words is "one trillion, six hundred seventy-eight billion, seven hundred eighty-four million, one hundred seventy-eight thousand, seven hundred sixty-eight".