68005630747 has 4 divisors (see below), whose sum is σ = 68066514256. Its totient is φ = 67944747240.

The previous prime is 68005630741. The next prime is 68005630799. The reversal of 68005630747 is 74703650086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68005630747 - 2²⁷ = 67871413019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68005630697 and 68005630706.

It is not an unprimeable number, because it can be changed into a prime (68005630741) 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, 30440079 + ... + 30442312.

It is an arithmetic number, because the mean of its divisors is an integer number (17016628564).

Almost surely, 2^68005630747 is an apocalyptic number.

68005630747 is a deficient number, since it is larger than the sum of its proper divisors (60883509).

68005630747 is a wasteful number, since it uses less digits than its factorization.

68005630747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60883508.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 68005630747 in words is "sixty-eight billion, five million, six hundred thirty thousand, seven hundred forty-seven".