681008701020 has 24 divisors (see below), whose sum is σ = 1906824363024. Its totient is φ = 181602320256.

The previous prime is 681008701013. The next prime is 681008701031. The reversal of 681008701020 is 20107800186.

It is a happy number.

681008701020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5675072449 + ... + 5675072568.

It is an arithmetic number, because the mean of its divisors is an integer number (79451015126).

Almost surely, 2^681008701020 is an apocalyptic number.

681008701020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681008701020 is an abundant number, since it is smaller than the sum of its proper divisors (1225815662004).

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

681008701020 is a wasteful number, since it uses less digits than its factorization.

681008701020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11350145029 (or 11350145027 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 681008701020 in words is "six hundred eighty-one billion, eight million, seven hundred one thousand, twenty".