690968305682 has 18 divisors (see below), whose sum is σ = 1039811871189. Its totient is φ = 344367960520.

The previous prime is 690968305639. The next prime is 690968305691. The reversal of 690968305682 is 286503869096.

It can be written as a sum of positive squares in 2 ways, for example, as 638910863761 + 52057441921 = 799319^2 + 228161^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=587779.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 457291307 + ... + 457292817.

Almost surely, 2^690968305682 is an apocalyptic number.

690968305682 is a deficient number, since it is larger than the sum of its proper divisors (348843565507).

690968305682 is an frugal number, since it uses more digits than its factorization.

690968305682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 62.

The spelling of 690968305682 in words is "six hundred ninety billion, nine hundred sixty-eight million, three hundred five thousand, six hundred eighty-two".