68084974385 has 4 divisors (see below), whose sum is σ = 81701969268. Its totient is φ = 54467979504.

The previous prime is 68084974367. The next prime is 68084974409. The reversal of 68084974385 is 58347948086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10493134096 + 57591840289 = 102436^2 + 239983^2 .

It is a cyclic number.

It is not a de Polignac number, because 68084974385 - 2²⁰ = 68083925809 is a prime.

It is a super-2 number, since 2×68084974385² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6808497434 + ... + 6808497443.

It is an arithmetic number, because the mean of its divisors is an integer number (20425492317).

Almost surely, 2^68084974385 is an apocalyptic number.

It is an amenable number.

68084974385 is a deficient number, since it is larger than the sum of its proper divisors (13616994883).

68084974385 is a wasteful number, since it uses less digits than its factorization.

68084974385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616994882.

The product of its (nonzero) digits is 46448640, while the sum is 62.

The spelling of 68084974385 in words is "sixty-eight billion, eighty-four million, nine hundred seventy-four thousand, three hundred eighty-five".