68988688986 has 16 divisors (see below), whose sum is σ = 157688432064. Its totient is φ = 19711053984.

The previous prime is 68988688973. The next prime is 68988688987.

68988688986 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 68988688899 and 68988688908.

It is not an unprimeable number, because it can be changed into a prime (68988688987) 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, 821293875 + ... + 821293958.

It is an arithmetic number, because the mean of its divisors is an integer number (9855527004).

Almost surely, 2^68988688986 is an apocalyptic number.

68988688986 is an abundant number, since it is smaller than the sum of its proper divisors (88699743078).

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

68988688986 is a wasteful number, since it uses less digits than its factorization.

68988688986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642587845.

The product of its digits is 4586471424, while the sum is 84.

The spelling of 68988688986 in words is "sixty-eight billion, nine hundred eighty-eight million, six hundred eighty-eight thousand, nine hundred eighty-six".