68426628664 has 8 divisors (see below), whose sum is σ = 128299928760. Its totient is φ = 34213314328.

The previous prime is 68426628623. The next prime is 68426628667. The reversal of 68426628664 is 46682662486.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 68426628599 and 68426628608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68426628667) 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 as a sum of consecutive naturals, namely, 4276664284 + ... + 4276664299.

It is an arithmetic number, because the mean of its divisors is an integer number (16037491095).

Almost surely, 2^68426628664 is an apocalyptic number.

It is an amenable number.

68426628664 is a deficient number, since it is larger than the sum of its proper divisors (59873300096).

68426628664 is a wasteful number, since it uses less digits than its factorization.

68426628664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8553328589 (or 8553328585 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 58.

The spelling of 68426628664 in words is "sixty-eight billion, four hundred twenty-six million, six hundred twenty-eight thousand, six hundred sixty-four".