68513445009 has 12 divisors (see below), whose sum is σ = 99316053252. Its totient is φ = 45513081600.

The previous prime is 68513445001. The next prime is 68513445017. The reversal of 68513445009 is 90054431586.

68513445009 is a `hidden beast` number, since 6 + 8 + 5 + 134 + 4 + 500 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (68513445001) and next prime (68513445017).

It can be written as a sum of positive squares in 2 ways, for example, as 52257960000 + 16255485009 = 228600^2 + 127497^2 .

It is not a de Polignac number, because 68513445009 - 2³ = 68513445001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68513445001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13543032 + ... + 13548089.

It is an arithmetic number, because the mean of its divisors is an integer number (8276337771).

Almost surely, 2^68513445009 is an apocalyptic number.

It is an amenable number.

68513445009 is a deficient number, since it is larger than the sum of its proper divisors (30802608243).

68513445009 is a wasteful number, since it uses less digits than its factorization.

68513445009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27091408 (or 27091405 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 68513445009 in words is "sixty-eight billion, five hundred thirteen million, four hundred forty-five thousand, nine".