68169516007 has 4 divisors (see below), whose sum is σ = 68250767760. Its totient is φ = 68088264256.

The previous prime is 68169516001. The next prime is 68169516013. The reversal of 68169516007 is 70061596186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70061596186 = 2 ⋅35030798093.

It is an interprime number because it is at equal distance from previous prime (68169516001) and next prime (68169516013).

It is a cyclic number.

It is not a de Polignac number, because 68169516007 - 2¹¹ = 68169513959 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68169516001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40624618 + ... + 40626295.

It is an arithmetic number, because the mean of its divisors is an integer number (17062691940).

Almost surely, 2^68169516007 is an apocalyptic number.

68169516007 is a deficient number, since it is larger than the sum of its proper divisors (81251753).

68169516007 is an equidigital number, since it uses as much as digits as its factorization.

68169516007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81251752.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 68169516007 in words is "sixty-eight billion, one hundred sixty-nine million, five hundred sixteen thousand, seven".