68750632009 has 4 divisors (see below), whose sum is σ = 68752644804. Its totient is φ = 68748619216.

The previous prime is 68750632007. The next prime is 68750632057. The reversal of 68750632009 is 90023605786.

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 24504771600 + 44245860409 = 156540^2 + 210347^2 .

It is a cyclic number.

It is not a de Polignac number, because 68750632009 - 2¹ = 68750632007 is a prime.

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 68750632009.

It is not an unprimeable number, because it can be changed into a prime (68750632007) 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, 954262 + ... + 1023775.

It is an arithmetic number, because the mean of its divisors is an integer number (17188161201).

Almost surely, 2^68750632009 is an apocalyptic number.

It is an amenable number.

68750632009 is a deficient number, since it is larger than the sum of its proper divisors (2012795).

68750632009 is a wasteful number, since it uses less digits than its factorization.

68750632009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012794.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 68750632009 in words is "sixty-eight billion, seven hundred fifty million, six hundred thirty-two thousand, nine".