68445024399 has 24 divisors (see below), whose sum is σ = 101419609200. Its totient is φ = 44454130560.

The previous prime is 68445024377. The next prime is 68445024413. The reversal of 68445024399 is 99342054486.

68445024399 is a `hidden beast` number, since 6 + 8 + 4 + 4 + 502 + 43 + 99 = 666.

It is a Cunningham number, because it is equal to 261620²-1.

It is not a de Polignac number, because 68445024399 - 2⁸ = 68445024143 is a prime.

It is a super-2 number, since 2×68445024399² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68445024199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130812 + ... + 392430.

It is an arithmetic number, because the mean of its divisors is an integer number (4225817050).

Almost surely, 2^68445024399 is an apocalyptic number.

68445024399 is a deficient number, since it is larger than the sum of its proper divisors (32974584801).

68445024399 is a wasteful number, since it uses less digits than its factorization.

68445024399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262375 (or 262372 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 68445024399 in words is "sixty-eight billion, four hundred forty-five million, twenty-four thousand, three hundred ninety-nine".