68885721867 has 8 divisors (see below), whose sum is σ = 91852661824. Its totient is φ = 45921298248.

The previous prime is 68885721823. The next prime is 68885721881. The reversal of 68885721867 is 76812758886.

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

It is not a de Polignac number, because 68885721867 - 2⁶ = 68885721803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68885721798 and 68885721807.

It is not an unprimeable number, because it can be changed into a prime (68885721167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564253 + ... + 675390.

It is an arithmetic number, because the mean of its divisors is an integer number (11481582728).

Almost surely, 2^68885721867 is an apocalyptic number.

68885721867 is a deficient number, since it is larger than the sum of its proper divisors (22966939957).

68885721867 is a wasteful number, since it uses less digits than its factorization.

68885721867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258169.

The product of its digits is 72253440, while the sum is 66.

The spelling of 68885721867 in words is "sixty-eight billion, eight hundred eighty-five million, seven hundred twenty-one thousand, eight hundred sixty-seven".