68720670258 has 64 divisors (see below), whose sum is σ = 146955417600. Its totient is φ = 21360905280.

The previous prime is 68720670247. The next prime is 68720670259. The reversal of 68720670258 is 85207602786.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 68720670258.

It is not an unprimeable number, because it can be changed into a prime (68720670259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2969460 + ... + 2992512.

It is an arithmetic number, because the mean of its divisors is an integer number (2296178400).

Almost surely, 2^68720670258 is an apocalyptic number.

68720670258 is an abundant number, since it is smaller than the sum of its proper divisors (78234747342).

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

68720670258 is a wasteful number, since it uses less digits than its factorization.

68720670258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23487.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 68720670258 in words is "sixty-eight billion, seven hundred twenty million, six hundred seventy thousand, two hundred fifty-eight".