684922761608 has 12 divisors (see below), whose sum is σ = 1284234567045. Its totient is φ = 342460210400.

The previous prime is 684922761599. The next prime is 684922761617. The reversal of 684922761608 is 806167229486.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (684922761599) and next prime (684922761617).

It can be written as a sum of positive squares in 2 ways, for example, as 650148717124 + 34774044484 = 806318^2 + 186478^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=585202.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2194508 + ... + 2487108.

Almost surely, 2^684922761608 is an apocalyptic number.

It is an amenable number.

684922761608 is a deficient number, since it is larger than the sum of its proper divisors (599311805437).

684922761608 is an frugal number, since it uses more digits than its factorization.

684922761608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585208 (or 292603 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 684922761608 in words is "six hundred eighty-four billion, nine hundred twenty-two million, seven hundred sixty-one thousand, six hundred eight".