68442449423755 has 64 divisors (see below), whose sum is σ = 92169794101248. Its totient is φ = 48363470991360.

The previous prime is 68442449423753. The next prime is 68442449423779. The reversal of 68442449423755 is 55732494424486.

It is not a de Polignac number, because 68442449423755 - 2¹ = 68442449423753 is a prime.

It is a super-2 number, since 2×68442449423755² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68442449423753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 300855262 + ... + 301082668.

It is an arithmetic number, because the mean of its divisors is an integer number (1440153032832).

Almost surely, 2^{68442449423755} is an apocalyptic number.

68442449423755 is a deficient number, since it is larger than the sum of its proper divisors (23727344677493).

68442449423755 is a wasteful number, since it uses less digits than its factorization.

68442449423755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228316.

The product of its digits is 928972800, while the sum is 67.

The spelling of 68442449423755 in words is "sixty-eight trillion, four hundred forty-two billion, four hundred forty-nine million, four hundred twenty-three thousand, seven hundred fifty-five".