68720880229345 has 8 divisors (see below), whose sum is σ = 82465197978600. Its totient is φ = 54976609714560.

The previous prime is 68720880229291. The next prime is 68720880229357. The reversal of 68720880229345 is 54392208802786.

It can be written as a sum of positive squares in 4 ways, for example, as 40108522930641 + 28612357298704 = 6333129^2 + 5349052^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68720880229345 - 2³⁵ = 68686520490977 is a prime.

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, 8524846 + ... + 14495335.

It is an arithmetic number, because the mean of its divisors is an integer number (10308149747325).

Almost surely, 2^{68720880229345} is an apocalyptic number.

It is an amenable number.

68720880229345 is a deficient number, since it is larger than the sum of its proper divisors (13744317749255).

68720880229345 is a wasteful number, since it uses less digits than its factorization.

68720880229345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23617235.

The product of its (nonzero) digits is 92897280, while the sum is 64.

The spelling of 68720880229345 in words is "sixty-eight trillion, seven hundred twenty billion, eight hundred eighty million, two hundred twenty-nine thousand, three hundred forty-five".