68511071 has 4 divisors (see below), whose sum is σ = 72541152. Its totient is φ = 64480992.

The previous prime is 68511061. The next prime is 68511073. The reversal of 68511071 is 17011586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17011586 = 2 ⋅8505793.

It is a cyclic number.

It is not a de Polignac number, because 68511071 - 2¹⁰ = 68510047 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 (68511073) 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, 2015015 + ... + 2015048.

It is an arithmetic number, because the mean of its divisors is an integer number (18135288).

Almost surely, 2^68511071 is an apocalyptic number.

68511071 is a deficient number, since it is larger than the sum of its proper divisors (4030081).

68511071 is a wasteful number, since it uses less digits than its factorization.

68511071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030080.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 68511071 is about 8277.1414751712. The cubic root of 68511071 is about 409.1855157192.

The spelling of 68511071 in words is "sixty-eight million, five hundred eleven thousand, seventy-one".