68989181759 has 4 divisors (see below), whose sum is σ = 68991614016. Its totient is φ = 68986749504.

The previous prime is 68989181713. The next prime is 68989181777. The reversal of 68989181759 is 95718198986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95718198986 = 2 ⋅47859099493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68989181759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68989181692 and 68989181701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68989180759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173074 + ... + 1230479.

It is an arithmetic number, because the mean of its divisors is an integer number (17247903504).

Almost surely, 2^68989181759 is an apocalyptic number.

68989181759 is a deficient number, since it is larger than the sum of its proper divisors (2432257).

68989181759 is a wasteful number, since it uses less digits than its factorization.

68989181759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432256.

The product of its digits is 78382080, while the sum is 71.

The spelling of 68989181759 in words is "sixty-eight billion, nine hundred eighty-nine million, one hundred eighty-one thousand, seven hundred fifty-nine".