686516486 has 4 divisors (see below), whose sum is σ = 1029774732. Its totient is φ = 343258242.

The previous prime is 686516461. The next prime is 686516497. The reversal of 686516486 is 684615686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 684615686 = 2 ⋅342307843.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171629120 + ... + 171629123.

It is an arithmetic number, because the mean of its divisors is an integer number (257443683).

Almost surely, 2^686516486 is an apocalyptic number.

686516486 is a deficient number, since it is larger than the sum of its proper divisors (343258246).

686516486 is a wasteful number, since it uses less digits than its factorization.

686516486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343258245.

The product of its digits is 1658880, while the sum is 50.

The square root of 686516486 is about 26201.4596158306. The cubic root of 686516486 is about 882.1660166750.

The spelling of 686516486 in words is "six hundred eighty-six million, five hundred sixteen thousand, four hundred eighty-six".