681356132500 has 60 divisors (see below), whose sum is σ = 1577636135460. Its totient is φ = 256510528000.

The previous prime is 681356132423. The next prime is 681356132507. The reversal of 681356132500 is 5231653186.

681356132500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 592878440196 + 88477692304 = 769986^2 + 297452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681356132507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7973455 + ... + 8058454.

It is an arithmetic number, because the mean of its divisors is an integer number (26293935591).

Almost surely, 2^681356132500 is an apocalyptic number.

It is an amenable number.

681356132500 is an abundant number, since it is smaller than the sum of its proper divisors (896280002960).

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

681356132500 is a wasteful number, since it uses less digits than its factorization.

681356132500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031950 (or 16031933 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 681356132500 its reverse (5231653186), we get a palindrome (686587785686).

The spelling of 681356132500 in words is "six hundred eighty-one billion, three hundred fifty-six million, one hundred thirty-two thousand, five hundred".