68281516969 has 4 divisors (see below), whose sum is σ = 71875281040. Its totient is φ = 64687752900.

The previous prime is 68281516967. The next prime is 68281517009. The reversal of 68281516969 is 96961518286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68281516969 - 2¹ = 68281516967 is a prime.

It is a super-2 number, since 2×68281516969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68281516967) 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, 1796882007 + ... + 1796882044.

It is an arithmetic number, because the mean of its divisors is an integer number (17968820260).

Almost surely, 2^68281516969 is an apocalyptic number.

It is an amenable number.

68281516969 is a deficient number, since it is larger than the sum of its proper divisors (3593764071).

68281516969 is a wasteful number, since it uses less digits than its factorization.

68281516969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593764070.

The product of its digits is 11197440, while the sum is 61.

The spelling of 68281516969 in words is "sixty-eight billion, two hundred eighty-one million, five hundred sixteen thousand, nine hundred sixty-nine".