681217016 has 8 divisors (see below), whose sum is σ = 1277281920. Its totient is φ = 340608504.

The previous prime is 681217007. The next prime is 681217037. The reversal of 681217016 is 610712186.

It is a happy number.

681217016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

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, 42576056 + ... + 42576071.

It is an arithmetic number, because the mean of its divisors is an integer number (159660240).

Almost surely, 2^681217016 is an apocalyptic number.

It is an amenable number.

681217016 is a deficient number, since it is larger than the sum of its proper divisors (596064904).

681217016 is a wasteful number, since it uses less digits than its factorization.

681217016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85152133 (or 85152129 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 681217016 is about 26100.1344057842. The cubic root of 681217016 is about 879.8902307986.

It can be divided in two parts, 6812170 and 16, that added together give a palindrome (6812186).

The spelling of 681217016 in words is "six hundred eighty-one million, two hundred seventeen thousand, sixteen".