12642123064 has 16 divisors (see below), whose sum is σ = 24028693920. Its totient is φ = 6234471360.

The previous prime is 12642123047. The next prime is 12642123071. The reversal of 12642123064 is 46032124621.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10823152 + ... + 10824319.

It is an arithmetic number, because the mean of its divisors is an integer number (1501793370).

Almost surely, 2^12642123064 is an apocalyptic number.

It is an amenable number.

12642123064 is a deficient number, since it is larger than the sum of its proper divisors (11386570856).

12642123064 is a wasteful number, since it uses less digits than its factorization.

12642123064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21647550 (or 21647546 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 12642123064 its reverse (46032124621), we get a palindrome (58674247685).

The spelling of 12642123064 in words is "twelve billion, six hundred forty-two million, one hundred twenty-three thousand, sixty-four".