681520060 has 96 divisors (see below), whose sum is σ = 1586273472. Its totient is φ = 244408320.

The previous prime is 681520019. The next prime is 681520079. The reversal of 681520060 is 60025186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1538199 + ... + 1538641.

It is an arithmetic number, because the mean of its divisors is an integer number (16523682).

Almost surely, 2^681520060 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681520060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793136736).

681520060 is an abundant number, since it is smaller than the sum of its proper divisors (904753412).

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

681520060 is a wasteful number, since it uses less digits than its factorization.

681520060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 681520060 is about 26105.9391710009. The cubic root of 681520060 is about 880.0206864972.

The spelling of 681520060 in words is "six hundred eighty-one million, five hundred twenty thousand, sixty".