68856947945 has 8 divisors (see below), whose sum is σ = 82764466944. Its totient is φ = 54994805424.

The previous prime is 68856947933. The next prime is 68856947959. The reversal of 68856947945 is 54974965886.

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 68856947945 - 2²⁰ = 68855899369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11340779 + ... + 11346848.

It is an arithmetic number, because the mean of its divisors is an integer number (10345558368).

Almost surely, 2^68856947945 is an apocalyptic number.

It is an amenable number.

68856947945 is a deficient number, since it is larger than the sum of its proper divisors (13907518999).

68856947945 is a wasteful number, since it uses less digits than its factorization.

68856947945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22688239.

The product of its digits is 522547200, while the sum is 71.

The spelling of 68856947945 in words is "sixty-eight billion, eight hundred fifty-six million, nine hundred forty-seven thousand, nine hundred forty-five".