68045023643 has 16 divisors (see below), whose sum is σ = 69988423680. Its totient is φ = 66115617600.

The previous prime is 68045023637. The next prime is 68045023687. The reversal of 68045023643 is 34632054086.

It is a cyclic number.

It is not a de Polignac number, because 68045023643 - 2¹⁴ = 68045007259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68045023643.

It is not an unprimeable number, because it can be changed into a prime (68045023843) 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 15 ways as a sum of consecutive naturals, for example, 14665718 + ... + 14670356.

It is an arithmetic number, because the mean of its divisors is an integer number (4374276480).

Almost surely, 2^68045023643 is an apocalyptic number.

68045023643 is a deficient number, since it is larger than the sum of its proper divisors (1943400037).

68045023643 is a wasteful number, since it uses less digits than its factorization.

68045023643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6058.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 68045023643 in words is "sixty-eight billion, forty-five million, twenty-three thousand, six hundred forty-three".