681318080 has 28 divisors (see below), whose sum is σ = 1622389440. Its totient is φ = 272527104.

The previous prime is 681318073. The next prime is 681318097. The reversal of 681318080 is 80813186.

It is a happy number.

It is a super-2 number, since 2×681318080² = 928388652269772800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 681318080.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064240 + ... + 1064879.

It is an arithmetic number, because the mean of its divisors is an integer number (57942480).

Almost surely, 2^681318080 is an apocalyptic number.

It is an amenable number.

681318080 is an abundant number, since it is smaller than the sum of its proper divisors (941071360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681318080 is a wasteful number, since it uses less digits than its factorization.

681318080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129136 (or 2129126 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 681318080 is about 26102.0704159651. The cubic root of 681318080 is about 879.9337415678.

The spelling of 681318080 in words is "six hundred eighty-one million, three hundred eighteen thousand, eighty".