68380511 has 4 divisors (see below), whose sum is σ = 72402912. Its totient is φ = 64358112.

The previous prime is 68380489. The next prime is 68380517. The reversal of 68380511 is 11508386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68380511 is a prime.

It is a super-2 number, since 2×68380511² = 9351788569242242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68380517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011175 + ... + 2011208.

It is an arithmetic number, because the mean of its divisors is an integer number (18100728).

Almost surely, 2^68380511 is an apocalyptic number.

68380511 is a deficient number, since it is larger than the sum of its proper divisors (4022401).

68380511 is a wasteful number, since it uses less digits than its factorization.

68380511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022400.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 68380511 is about 8269.2509334280. The cubic root of 68380511 is about 408.9254252357.

Adding to 68380511 its reverse (11508386), we get a palindrome (79888897).

The spelling of 68380511 in words is "sixty-eight million, three hundred eighty thousand, five hundred eleven".