68143933865 has 64 divisors (see below), whose sum is σ = 102498877440. Its totient is φ = 42438193920.

The previous prime is 68143933861. The next prime is 68143933901. The reversal of 68143933865 is 56833934186.

It is not a de Polignac number, because 68143933865 - 2² = 68143933861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68143933865.

It is not an unprimeable number, because it can be changed into a prime (68143933861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2190359 + ... + 2221251.

It is an arithmetic number, because the mean of its divisors is an integer number (1601544960).

Almost surely, 2^68143933865 is an apocalyptic number.

It is an amenable number.

68143933865 is a deficient number, since it is larger than the sum of its proper divisors (34354943575).

68143933865 is a wasteful number, since it uses less digits than its factorization.

68143933865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31062.

The product of its digits is 11197440, while the sum is 56.

The spelling of 68143933865 in words is "sixty-eight billion, one hundred forty-three million, nine hundred thirty-three thousand, eight hundred sixty-five".