68316213220 has 36 divisors (see below), whose sum is σ = 149972836860. Its totient is φ = 26138373184.

The previous prime is 68316213179. The next prime is 68316213233. The reversal of 68316213220 is 2231261386.

It can be written as a sum of positive squares in 2 ways, for example, as 17697513024 + 50618700196 = 133032^2 + 224986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3217975 + ... + 3239134.

It is an arithmetic number, because the mean of its divisors is an integer number (4165912135).

Almost surely, 2^68316213220 is an apocalyptic number.

It is an amenable number.

68316213220 is an abundant number, since it is smaller than the sum of its proper divisors (81656623640).

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

68316213220 is a wasteful number, since it uses less digits than its factorization.

68316213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457164 (or 6457139 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 68316213220 in words is "sixty-eight billion, three hundred sixteen million, two hundred thirteen thousand, two hundred twenty".