682687216477 has 16 divisors (see below), whose sum is σ = 804344329600. Its totient is φ = 579127860864.

The previous prime is 682687216459. The next prime is 682687216507. The reversal of 682687216477 is 774612786286.

It is a de Polignac number, because none of the positive numbers 2^k-682687216477 is a prime.

It is a super-2 number, since 2×682687216477² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682687216427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10226223 + ... + 10292764.

It is an arithmetic number, because the mean of its divisors is an integer number (50271520600).

Almost surely, 2^682687216477 is an apocalyptic number.

It is an amenable number.

682687216477 is a deficient number, since it is larger than the sum of its proper divisors (121657113123).

682687216477 is an equidigital number, since it uses as much as digits as its factorization.

682687216477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20519105 (or 20519091 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 64.

The spelling of 682687216477 in words is "six hundred eighty-two billion, six hundred eighty-seven million, two hundred sixteen thousand, four hundred seventy-seven".