68687127664 has 10 divisors (see below), whose sum is σ = 133081309880. Its totient is φ = 34343563824.

The previous prime is 68687127653. The next prime is 68687127667. The reversal of 68687127664 is 46672178686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68687127667) 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 as a sum of consecutive naturals, namely, 2146472724 + ... + 2146472755.

It is an arithmetic number, because the mean of its divisors is an integer number (13308130988).

Almost surely, 2^68687127664 is an apocalyptic number.

It is an amenable number.

68687127664 is a deficient number, since it is larger than the sum of its proper divisors (64394182216).

68687127664 is a wasteful number, since it uses less digits than its factorization.

68687127664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292945487 (or 4292945481 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 61.

The spelling of 68687127664 in words is "sixty-eight billion, six hundred eighty-seven million, one hundred twenty-seven thousand, six hundred sixty-four".