68516756738 has 8 divisors (see below), whose sum is σ = 102778484988. Its totient is φ = 34257261744.

The previous prime is 68516756731. The next prime is 68516756783. The reversal of 68516756738 is 83765761586.

It can be written as a sum of positive squares in 2 ways, for example, as 67988998009 + 527758729 = 260747^2 + 22973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (68516756731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479381 + ... + 605672.

Almost surely, 2^68516756738 is an apocalyptic number.

68516756738 is a deficient number, since it is larger than the sum of its proper divisors (34261728250).

68516756738 is a wasteful number, since it uses less digits than its factorization.

68516756738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116628.

The product of its digits is 50803200, while the sum is 62.

The spelling of 68516756738 in words is "sixty-eight billion, five hundred sixteen million, seven hundred fifty-six thousand, seven hundred thirty-eight".