68285947069 has 4 divisors (see below), whose sum is σ = 70131513244. Its totient is φ = 66440380896.

The previous prime is 68285947033. The next prime is 68285947087. The reversal of 68285947069 is 96074958286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34433626969 + 33852320100 = 185563^2 + 183990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68285947069 is a prime.

It is a super-2 number, since 2×68285947069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68285947069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68285947369) 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, 922783032 + ... + 922783105.

It is an arithmetic number, because the mean of its divisors is an integer number (17532878311).

Almost surely, 2^68285947069 is an apocalyptic number.

It is an amenable number.

68285947069 is a deficient number, since it is larger than the sum of its proper divisors (1845566175).

68285947069 is a wasteful number, since it uses less digits than its factorization.

68285947069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845566174.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 68285947069 in words is "sixty-eight billion, two hundred eighty-five million, nine hundred forty-seven thousand, sixty-nine".