68843649419221 has 16 divisors (see below), whose sum is σ = 71767746551808. Its totient is φ = 65964190906800.

The previous prime is 68843649419213. The next prime is 68843649419263. The reversal of 68843649419221 is 12291494634886.

It is a cyclic number.

It is not a de Polignac number, because 68843649419221 - 2³ = 68843649419213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68843649419201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405816 + ... + 11741038.

It is an arithmetic number, because the mean of its divisors is an integer number (4485484159488).

Almost surely, 2^{68843649419221} is an apocalyptic number.

It is an amenable number.

68843649419221 is a deficient number, since it is larger than the sum of its proper divisors (2924097132587).

68843649419221 is a wasteful number, since it uses less digits than its factorization.

68843649419221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11337192.

The product of its digits is 143327232, while the sum is 67.

The spelling of 68843649419221 in words is "sixty-eight trillion, eight hundred forty-three billion, six hundred forty-nine million, four hundred nineteen thousand, two hundred twenty-one".