68680684900 has 81 divisors (see below), whose sum is σ = 151528739691. Its totient is φ = 27020465280.

The previous prime is 68680684867. The next prime is 68680684901. The reversal of 68680684900 is 948608686.

It is a happy number.

The square root of 68680684900 is 262070.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 375816996 + 68304867904 = 19386^2 + 261352^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68680684901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 191310921 + ... + 191311279.

Almost surely, 2^68680684900 is an apocalyptic number.

68680684900 is the 262070-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68680684900

68680684900 is an abundant number, since it is smaller than the sum of its proper divisors (82848054791).

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

68680684900 is an equidigital number, since it uses as much as digits as its factorization.

68680684900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 68680684900 in words is "sixty-eight billion, six hundred eighty million, six hundred eighty-four thousand, nine hundred".