68389774994751 has 128 divisors (see below), whose sum is σ = 112998765035520. Its totient is φ = 35923016529792.

The previous prime is 68389774994707. The next prime is 68389774994767. The reversal of 68389774994751 is 15749947798386.

It is not a de Polignac number, because 68389774994751 - 2⁶ = 68389774994687 is a prime.

It is a super-2 number, since 2×68389774994751² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68389774994551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3398577376 + ... + 3398597498.

It is an arithmetic number, because the mean of its divisors is an integer number (882802851840).

Almost surely, 2^{68389774994751} is an apocalyptic number.

68389774994751 is a deficient number, since it is larger than the sum of its proper divisors (44608990040769).

68389774994751 is a wasteful number, since it uses less digits than its factorization.

68389774994751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21753.

The product of its digits is 23044331520, while the sum is 87.

The spelling of 68389774994751 in words is "sixty-eight trillion, three hundred eighty-nine billion, seven hundred seventy-four million, nine hundred ninety-four thousand, seven hundred fifty-one".