68659595729 has 4 divisors (see below), whose sum is σ = 68683748976. Its totient is φ = 68635442484.

The previous prime is 68659595717. The next prime is 68659595731. The reversal of 68659595729 is 92759595686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92759595686 = 2 ⋅46379797843.

It is a cyclic number.

It is not a de Polignac number, because 68659595729 - 2¹² = 68659591633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68659595759) 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, 12072359 + ... + 12078044.

It is an arithmetic number, because the mean of its divisors is an integer number (17170937244).

Almost surely, 2^68659595729 is an apocalyptic number.

It is an amenable number.

68659595729 is a deficient number, since it is larger than the sum of its proper divisors (24153247).

68659595729 is a wasteful number, since it uses less digits than its factorization.

68659595729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24153246.

The product of its digits is 367416000, while the sum is 71.

The spelling of 68659595729 in words is "sixty-eight billion, six hundred fifty-nine million, five hundred ninety-five thousand, seven hundred twenty-nine".