68975556221 has 64 divisors (see below), whose sum is σ = 85620326400. Its totient is φ = 54674231040.

The previous prime is 68975556211. The next prime is 68975556239. The reversal of 68975556221 is 12265557986.

It is not a de Polignac number, because 68975556221 - 2³⁴ = 51795687037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68975556211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115150880 + ... + 115151478.

It is an arithmetic number, because the mean of its divisors is an integer number (1337817600).

Almost surely, 2^68975556221 is an apocalyptic number.

It is an amenable number.

68975556221 is a deficient number, since it is larger than the sum of its proper divisors (16644770179).

68975556221 is a wasteful number, since it uses less digits than its factorization.

68975556221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its digits is 9072000, while the sum is 56.

The spelling of 68975556221 in words is "sixty-eight billion, nine hundred seventy-five million, five hundred fifty-six thousand, two hundred twenty-one".