68843549653 has 4 divisors (see below), whose sum is σ = 71836747488. Its totient is φ = 65850351820.

The previous prime is 68843549651. The next prime is 68843549657. The reversal of 68843549653 is 35694534886.

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 a cyclic number.

It is not a de Polignac number, because 68843549653 - 2¹ = 68843549651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68843549591 and 68843549600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68843549651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496598883 + ... + 1496598928.

It is an arithmetic number, because the mean of its divisors is an integer number (17959186872).

Almost surely, 2^68843549653 is an apocalyptic number.

It is an amenable number.

68843549653 is a deficient number, since it is larger than the sum of its proper divisors (2993197835).

68843549653 is a wasteful number, since it uses less digits than its factorization.

68843549653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993197834.

The product of its digits is 74649600, while the sum is 61.

The spelling of 68843549653 in words is "sixty-eight billion, eight hundred forty-three million, five hundred forty-nine thousand, six hundred fifty-three".