68440506220 has 24 divisors (see below), whose sum is σ = 146161083600. Its totient is φ = 26912198592.

The previous prime is 68440506149. The next prime is 68440506259. The reversal of 68440506220 is 2260504486.

68440506220 is a modest number, since divided by 506220 gives 68440 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 68440506220.

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, 28999035 + ... + 29001394.

It is an arithmetic number, because the mean of its divisors is an integer number (6090045150).

Almost surely, 2^68440506220 is an apocalyptic number.

It is an amenable number.

68440506220 is an abundant number, since it is smaller than the sum of its proper divisors (77720577380).

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

68440506220 is a wasteful number, since it uses less digits than its factorization.

68440506220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58000497 (or 58000495 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 68440506220 in words is "sixty-eight billion, four hundred forty million, five hundred six thousand, two hundred twenty".