689689585986986 has 32 divisors (see below), whose sum is σ = 1114397562929616. Its totient is φ = 318237241536000.

The previous prime is 689689585986977. The next prime is 689689585987097.

689689585986986 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 246394710211225 + 443294875775761 = 15696965^2 + 21054569^2 .

It is a super-2 number, since 2×689689585986986² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5332270676 + ... + 5332400016.

Almost surely, 2^{689689585986986} is an apocalyptic number.

689689585986986 is a deficient number, since it is larger than the sum of its proper divisors (424707976942630).

689689585986986 is a wasteful number, since it uses less digits than its factorization.

689689585986986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179978.

The product of its digits is 6965703475200, while the sum is 110.

The spelling of 689689585986986 in words is "six hundred eighty-nine trillion, six hundred eighty-nine billion, five hundred eighty-five million, nine hundred eighty-six thousand, nine hundred eighty-six".