686732038868 has 12 divisors (see below), whose sum is σ = 1202586022260. Its totient is φ = 343136032512.

The previous prime is 686732038793. The next prime is 686732038871. The reversal of 686732038868 is 868830237686.

It can be written as a sum of positive squares in 2 ways, for example, as 651542781124 + 35189257744 = 807182^2 + 187588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57490013 + ... + 57501956.

It is an arithmetic number, because the mean of its divisors is an integer number (100215501855).

Almost surely, 2^686732038868 is an apocalyptic number.

It is an amenable number.

686732038868 is a deficient number, since it is larger than the sum of its proper divisors (515853983392).

686732038868 is a wasteful number, since it uses less digits than its factorization.

686732038868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114993466 (or 114993464 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 65.

The spelling of 686732038868 in words is "six hundred eighty-six billion, seven hundred thirty-two million, thirty-eight thousand, eight hundred sixty-eight".