68617073553 has 8 divisors (see below), whose sum is σ = 104559350208. Its totient is φ = 39209756304.

The previous prime is 68617073549. The next prime is 68617073561. The reversal of 68617073553 is 35537071686.

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

It is not a de Polignac number, because 68617073553 - 2² = 68617073549 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68617073496 and 68617073505.

It is not an unprimeable number, because it can be changed into a prime (68617073513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633739826 + ... + 1633739867.

It is an arithmetic number, because the mean of its divisors is an integer number (13069918776).

Almost surely, 2^68617073553 is an apocalyptic number.

It is an amenable number.

68617073553 is a deficient number, since it is larger than the sum of its proper divisors (35942276655).

68617073553 is a wasteful number, since it uses less digits than its factorization.

68617073553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267479703.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 68617073553 in words is "sixty-eight billion, six hundred seventeen million, seventy-three thousand, five hundred fifty-three".