768409921986 has 16 divisors (see below), whose sum is σ = 1756365536064. Its totient is φ = 219545691984.

The previous prime is 768409921963. The next prime is 768409922107. The reversal of 768409921986 is 689129904867.

768409921986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 768409921986.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9147737125 + ... + 9147737208.

It is an arithmetic number, because the mean of its divisors is an integer number (109772846004).

Almost surely, 2^768409921986 is an apocalyptic number.

768409921986 is an abundant number, since it is smaller than the sum of its proper divisors (987955614078).

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

768409921986 is a wasteful number, since it uses less digits than its factorization.

768409921986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18295474345.

The product of its (nonzero) digits is 94058496, while the sum is 69.

The spelling of 768409921986 in words is "seven hundred sixty-eight billion, four hundred nine million, nine hundred twenty-one thousand, nine hundred eighty-six".