68724212069 has 6 divisors (see below), whose sum is σ = 70631824914. Its totient is φ = 66866799600.

The previous prime is 68724212059. The next prime is 68724212071. The reversal of 68724212069 is 96021242786.

It can be written as a sum of positive squares in 3 ways, for example, as 36337890625 + 32386321444 = 190625^2 + 179962^2 .

It is not a de Polignac number, because 68724212069 - 2²⁴ = 68707434853 is a prime.

It is a super-2 number, since 2×68724212069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68724212059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25098782 + ... + 25101519.

It is an arithmetic number, because the mean of its divisors is an integer number (11771970819).

Almost surely, 2^68724212069 is an apocalyptic number.

It is an amenable number.

68724212069 is a deficient number, since it is larger than the sum of its proper divisors (1907612845).

68724212069 is an equidigital number, since it uses as much as digits as its factorization.

68724212069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50200375 (or 50200338 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 68724212069 in words is "sixty-eight billion, seven hundred twenty-four million, two hundred twelve thousand, sixty-nine".