68720905472 has 36 divisors (see below), whose sum is σ = 137486062560. Its totient is φ = 34282126848.

The previous prime is 68720905439. The next prime is 68720905489. The reversal of 68720905472 is 27450902786.

It is a self number, because there is not a number n which added to its sum of digits gives 68720905472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193358 + ... + 418125.

Almost surely, 2^68720905472 is an apocalyptic number.

It is an amenable number.

68720905472 is an abundant number, since it is smaller than the sum of its proper divisors (68765157088).

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

68720905472 is an equidigital number, since it uses as much as digits as its factorization.

68720905472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611938 (or 611924 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 68720905472 in words is "sixty-eight billion, seven hundred twenty million, nine hundred five thousand, four hundred seventy-two".