681311980 has 24 divisors (see below), whose sum is σ = 1492962912. Its totient is φ = 260675712.

The previous prime is 681311959. The next prime is 681312001. The reversal of 681311980 is 89113186.

It is an interprime number because it is at equal distance from previous prime (681311959) and next prime (681312001).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740097 + ... + 741016.

It is an arithmetic number, because the mean of its divisors is an integer number (62206788).

Almost surely, 2^681311980 is an apocalyptic number.

It is an amenable number.

681311980 is an abundant number, since it is smaller than the sum of its proper divisors (811650932).

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

681311980 is a wasteful number, since it uses less digits than its factorization.

681311980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481145 (or 1481143 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 681311980 is about 26101.9535667352. The cubic root of 681311980 is about 879.9311154758.

The spelling of 681311980 in words is "six hundred eighty-one million, three hundred eleven thousand, nine hundred eighty".