68444856011 has 16 divisors (see below), whose sum is σ = 81037578240. Its totient is φ = 56569523040.

The previous prime is 68444855953. The next prime is 68444856019. The reversal of 68444856011 is 11065844486.

It is a cyclic number.

It is not a de Polignac number, because 68444856011 - 2²⁶ = 68377747147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68444856019) 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, 509231 + ... + 629448.

It is an arithmetic number, because the mean of its divisors is an integer number (5064848640).

Almost surely, 2^68444856011 is an apocalyptic number.

68444856011 is a deficient number, since it is larger than the sum of its proper divisors (12592722229).

68444856011 is a wasteful number, since it uses less digits than its factorization.

68444856011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138994.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 68444856011 in words is "sixty-eight billion, four hundred forty-four million, eight hundred fifty-six thousand, eleven".