68135747518 has 16 divisors (see below), whose sum is σ = 102332745216. Its totient is φ = 34024862880.

The previous prime is 68135747507. The next prime is 68135747557. The reversal of 68135747518 is 81574753186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5758048 + ... + 5769868.

It is an arithmetic number, because the mean of its divisors is an integer number (6395796576).

Almost surely, 2^68135747518 is an apocalyptic number.

68135747518 is a deficient number, since it is larger than the sum of its proper divisors (34196997698).

68135747518 is a wasteful number, since it uses less digits than its factorization.

68135747518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219.

The product of its digits is 5644800, while the sum is 55.

The spelling of 68135747518 in words is "sixty-eight billion, one hundred thirty-five million, seven hundred forty-seven thousand, five hundred eighteen".