68820213456 has 30 divisors (see below), whose sum is σ = 192601014450. Its totient is φ = 22940071104.

The previous prime is 68820213421. The next prime is 68820213457. The reversal of 68820213456 is 65431202886.

It can be written as a sum of positive squares in only one way, i.e., 36450446400 + 32369767056 = 190920^2 + 179916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68820213457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 238958931 + ... + 238959218.

It is an arithmetic number, because the mean of its divisors is an integer number (6420033815).

Almost surely, 2^68820213456 is an apocalyptic number.

It is an amenable number.

68820213456 is an abundant number, since it is smaller than the sum of its proper divisors (123780800994).

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

68820213456 is a wasteful number, since it uses less digits than its factorization.

68820213456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477918163 (or 477918154 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 68820213456 in words is "sixty-eight billion, eight hundred twenty million, two hundred thirteen thousand, four hundred fifty-six".