68461735129 has 8 divisors (see below), whose sum is σ = 68873692680. Its totient is φ = 68049964416.

The previous prime is 68461735109. The next prime is 68461735151. The reversal of 68461735129 is 92153716486.

It can be written as a sum of positive squares in 4 ways, for example, as 47733510400 + 20728224729 = 218480^2 + 143973^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68461735129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68461735109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726667 + ... + 815455.

It is an arithmetic number, because the mean of its divisors is an integer number (8609211585).

Almost surely, 2^68461735129 is an apocalyptic number.

It is an amenable number.

68461735129 is a deficient number, since it is larger than the sum of its proper divisors (411957551).

68461735129 is a wasteful number, since it uses less digits than its factorization.

68461735129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93419.

The product of its digits is 2177280, while the sum is 52.

The spelling of 68461735129 in words is "sixty-eight billion, four hundred sixty-one million, seven hundred thirty-five thousand, one hundred twenty-nine".