68549153809 has 8 divisors (see below), whose sum is σ = 68621823648. Its totient is φ = 68476525920.

The previous prime is 68549153789. The next prime is 68549153831. The reversal of 68549153809 is 90835194586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68549153809 - 2¹⁹ = 68548629521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68549153209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4042669 + ... + 4059589.

It is an arithmetic number, because the mean of its divisors is an integer number (8577727956).

Almost surely, 2^68549153809 is an apocalyptic number.

It is an amenable number.

68549153809 is a deficient number, since it is larger than the sum of its proper divisors (72669839).

68549153809 is a wasteful number, since it uses less digits than its factorization.

68549153809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20975.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 68549153809 in words is "sixty-eight billion, five hundred forty-nine million, one hundred fifty-three thousand, eight hundred nine".