768684681978 has 8 divisors (see below), whose sum is σ = 1537369363968. Its totient is φ = 256228227324.

The previous prime is 768684681977. The next prime is 768684681997. The reversal of 768684681978 is 879186486867.

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

768684681978 is an admirable number.

It is a super-2 number, since 2×768684681978² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (768684681977) 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, 64057056826 + ... + 64057056837.

It is an arithmetic number, because the mean of its divisors is an integer number (192171170496).

Almost surely, 2^768684681978 is an apocalyptic number.

768684681978 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.

768684681978 is a wasteful number, since it uses less digits than its factorization.

768684681978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128114113668.

The product of its digits is 1560674304, while the sum is 78.

The spelling of 768684681978 in words is "seven hundred sixty-eight billion, six hundred eighty-four million, six hundred eighty-one thousand, nine hundred seventy-eight".