686451016 has 16 divisors (see below), whose sum is σ = 1287425340. Its totient is φ = 343137600.

The previous prime is 686450993. The next prime is 686451023. The reversal of 686451016 is 610154686.

It can be written as a sum of positive squares in 2 ways, for example, as 406022500 + 280428516 = 20150^2 + 16746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32166 + ... + 49066.

Almost surely, 2^686451016 is an apocalyptic number.

It is an amenable number.

686451016 is a deficient number, since it is larger than the sum of its proper divisors (600974324).

686451016 is a wasteful number, since it uses less digits than its factorization.

686451016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21984 (or 21980 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 686451016 is about 26200.2102281642. The cubic root of 686451016 is about 882.1379730439.

The spelling of 686451016 in words is "six hundred eighty-six million, four hundred fifty-one thousand, sixteen".