781867968018 has 8 divisors (see below), whose sum is σ = 1563735936048. Its totient is φ = 260622656004.

The previous prime is 781867967981. The next prime is 781867968019. The reversal of 781867968018 is 810869768187.

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

781867968018 is an admirable number.

It is a super-2 number, since 2×781867968018² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781867968019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65155663996 + ... + 65155664007.

It is an arithmetic number, because the mean of its divisors is an integer number (195466992006).

Almost surely, 2^781867968018 is an apocalyptic number.

781867968018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

781867968018 is a wasteful number, since it uses less digits than its factorization.

781867968018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130311328008.

The product of its (nonzero) digits is 65028096, while the sum is 69.

The spelling of 781867968018 in words is "seven hundred eighty-one billion, eight hundred sixty-seven million, nine hundred sixty-eight thousand, eighteen".