1778863186968 has 128 divisors (see below), whose sum is σ = 5131437696000. Its totient is φ = 503353751040.

The previous prime is 1778863186931. The next prime is 1778863186973. The reversal of 1778863186968 is 8696813688771.

It is a junction number, because it is equal to n+sod(n) for n = 1778863186893 and 1778863186902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42261373 + ... + 42303443.

It is an arithmetic number, because the mean of its divisors is an integer number (40089357000).

Almost surely, 2^{1778863186968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778863186968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2565718848000).

1778863186968 is an abundant number, since it is smaller than the sum of its proper divisors (3352574509032).

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

1778863186968 is a wasteful number, since it uses less digits than its factorization.

1778863186968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44505 (or 44501 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 78.

The spelling of 1778863186968 in words is "one trillion, seven hundred seventy-eight billion, eight hundred sixty-three million, one hundred eighty-six thousand, nine hundred sixty-eight".