68813956948890 has 32 divisors (see below), whose sum is σ = 165218441216256. Its totient is φ = 18343172459840.

The previous prime is 68813956948879. The next prime is 68813956948897. The reversal of 68813956948890 is 9884965931886.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68813956948897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450926181 + ... + 451078760.

It is an arithmetic number, because the mean of its divisors is an integer number (5163076288008).

Almost surely, 2^{68813956948890} is an apocalyptic number.

68813956948890 is an abundant number, since it is smaller than the sum of its proper divisors (96404484267366).

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

68813956948890 is a wasteful number, since it uses less digits than its factorization.

68813956948890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902007494.

The product of its (nonzero) digits is 6449725440, while the sum is 84.

The spelling of 68813956948890 in words is "sixty-eight trillion, eight hundred thirteen billion, nine hundred fifty-six million, nine hundred forty-eight thousand, eight hundred ninety".