68921000001 has 24 divisors (see below), whose sum is σ = 113857720704. Its totient is φ = 39354569280.

The previous prime is 68920999997. The next prime is 68921000009. The reversal of 68921000001 is 10000012986.

It is a Cunningham number, because it is equal to 4100³+1.

It is not a de Polignac number, because 68921000001 - 2² = 68920999997 is a prime.

It is a super-2 number, since 2×68921000001² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68921000009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314020 + ... + 486261.

It is an arithmetic number, because the mean of its divisors is an integer number (4744071696).

Almost surely, 2^68921000001 is an apocalyptic number.

It is an amenable number.

68921000001 is a deficient number, since it is larger than the sum of its proper divisors (44936720703).

68921000001 is a wasteful number, since it uses less digits than its factorization.

68921000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801661 (or 801658 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

Adding to 68921000001 its reverse (10000012986), we get a palindrome (78921012987).

The spelling of 68921000001 in words is "sixty-eight billion, nine hundred twenty-one million, one", and thus it is an aban number.