68290129209 has 4 divisors (see below), whose sum is σ = 91053505616. Its totient is φ = 45526752804.

The previous prime is 68290129207. The next prime is 68290129211. The reversal of 68290129209 is 90292109286.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (68290129207) and next prime (68290129211).

It is not a de Polignac number, because 68290129209 - 2¹ = 68290129207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68290129207) 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, 11381688199 + ... + 11381688204.

It is an arithmetic number, because the mean of its divisors is an integer number (22763376404).

Almost surely, 2^68290129209 is an apocalyptic number.

It is an amenable number.

68290129209 is a deficient number, since it is larger than the sum of its proper divisors (22763376407).

68290129209 is a wasteful number, since it uses less digits than its factorization.

68290129209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22763376406.

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 68290129209 in words is "sixty-eight billion, two hundred ninety million, one hundred twenty-nine thousand, two hundred nine".