68011511 has 4 divisors (see below), whose sum is σ = 68044152. Its totient is φ = 67978872.

The previous prime is 68011501. The next prime is 68011547. The reversal of 68011511 is 11511086.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68011511 - 2¹⁰ = 68010487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68011501) 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, 12965 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (17011038).

Almost surely, 2^68011511 is an apocalyptic number.

68011511 is a deficient number, since it is larger than the sum of its proper divisors (32641).

68011511 is a wasteful number, since it uses less digits than its factorization.

68011511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32640.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 68011511 is about 8246.9091785953. The cubic root of 68011511 is about 408.1885402314.

Adding to 68011511 its reverse (11511086), we get a palindrome (79522597).

It can be divided in two parts, 6801 and 1511, that multiplied together give a triangular number (10276311 = T₄₅₃₃).

The spelling of 68011511 in words is "sixty-eight million, eleven thousand, five hundred eleven".