68642771065 has 8 divisors (see below), whose sum is σ = 89859627648. Its totient is φ = 49922015280.

The previous prime is 68642771051. The next prime is 68642771083. The reversal of 68642771065 is 56017724686.

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

It is not a de Polignac number, because 68642771065 - 2¹⁷ = 68642639993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 624025137 + ... + 624025246.

It is an arithmetic number, because the mean of its divisors is an integer number (11232453456).

Almost surely, 2^68642771065 is an apocalyptic number.

It is an amenable number.

68642771065 is a deficient number, since it is larger than the sum of its proper divisors (21216856583).

68642771065 is a wasteful number, since it uses less digits than its factorization.

68642771065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248050399.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 68642771065 in words is "sixty-eight billion, six hundred forty-two million, seven hundred seventy-one thousand, sixty-five".