68815153955 has 8 divisors (see below), whose sum is σ = 82680264000. Its totient is φ = 54984070336.

The previous prime is 68815153903. The next prime is 68815153963. The reversal of 68815153955 is 55935151886.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68815153955 - 2²⁰ = 68814105379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68815153955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8502155 + ... + 8510244.

It is an arithmetic number, because the mean of its divisors is an integer number (10335033000).

Almost surely, 2^68815153955 is an apocalyptic number.

68815153955 is a deficient number, since it is larger than the sum of its proper divisors (13865110045).

68815153955 is a wasteful number, since it uses less digits than its factorization.

68815153955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17013213.

The product of its digits is 6480000, while the sum is 56.

The spelling of 68815153955 in words is "sixty-eight billion, eight hundred fifteen million, one hundred fifty-three thousand, nine hundred fifty-five".