68445575520 has 144 divisors (see below), whose sum is σ = 250804230768. Its totient is φ = 15644697600.

The previous prime is 68445575489. The next prime is 68445575537. The reversal of 68445575520 is 2557554486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1431531 + ... + 1478570.

It is an arithmetic number, because the mean of its divisors is an integer number (1741696047).

Almost surely, 2^68445575520 is an apocalyptic number.

68445575520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68445575520 is an abundant number, since it is smaller than the sum of its proper divisors (182358655248).

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

68445575520 is a wasteful number, since it uses less digits than its factorization.

68445575520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910133 (or 2910118 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 51.

The spelling of 68445575520 in words is "sixty-eight billion, four hundred forty-five million, five hundred seventy-five thousand, five hundred twenty".