681913487500 has 144 divisors (see below), whose sum is σ = 1778796149760. Its totient is φ = 223633080000.

The previous prime is 681913487483. The next prime is 681913487503. The reversal of 681913487500 is 5784319186.

It is not an unprimeable number, because it can be changed into a prime (681913487503) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1843081 + ... + 2181919.

It is an arithmetic number, because the mean of its divisors is an integer number (12352751040).

Almost surely, 2^681913487500 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 681913487500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889398074880).

681913487500 is an abundant number, since it is smaller than the sum of its proper divisors (1096882662260).

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

681913487500 is a wasteful number, since it uses less digits than its factorization.

681913487500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338898 (or 338876 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 681913487500 in words is "six hundred eighty-one billion, nine hundred thirteen million, four hundred eighty-seven thousand, five hundred".