68517688502 has 4 divisors (see below), whose sum is σ = 102776532756. Its totient is φ = 34258844250.

The previous prime is 68517688487. The next prime is 68517688513. The reversal of 68517688502 is 20588671586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17129422124 + ... + 17129422127.

It is an arithmetic number, because the mean of its divisors is an integer number (25694133189).

Almost surely, 2^68517688502 is an apocalyptic number.

68517688502 is a deficient number, since it is larger than the sum of its proper divisors (34258844254).

68517688502 is a wasteful number, since it uses less digits than its factorization.

68517688502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34258844253.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 68517688502 in words is "sixty-eight billion, five hundred seventeen million, six hundred eighty-eight thousand, five hundred two".