68517513043 has 16 divisors (see below), whose sum is σ = 82464256000. Its totient is φ = 55613189952.

The previous prime is 68517513007. The next prime is 68517513101. The reversal of 68517513043 is 34031571586.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68517513043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68517510043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182743 + ... + 412831.

It is an arithmetic number, because the mean of its divisors is an integer number (5154016000).

Almost surely, 2^68517513043 is an apocalyptic number.

68517513043 is a deficient number, since it is larger than the sum of its proper divisors (13946742957).

68517513043 is a wasteful number, since it uses less digits than its factorization.

68517513043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232354.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 68517513043 in words is "sixty-eight billion, five hundred seventeen million, five hundred thirteen thousand, forty-three".