68168511 has 12 divisors (see below), whose sum is σ = 98643792. Its totient is φ = 45363456.

The previous prime is 68168509. The next prime is 68168533. The reversal of 68168511 is 11586186.

68168511 is a `hidden beast` number, since 6 + 81 + 68 + 511 = 666.

It is not a de Polignac number, because 68168511 - 2¹ = 68168509 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68168311) 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, 1371 + ... + 11756.

It is an arithmetic number, because the mean of its divisors is an integer number (8220316).

Almost surely, 2^68168511 is an apocalyptic number.

68168511 is a deficient number, since it is larger than the sum of its proper divisors (30475281).

68168511 is a wasteful number, since it uses less digits than its factorization.

68168511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13710 (or 13707 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 68168511 is about 8256.4224092521. The cubic root of 68168511 is about 408.5023907870.

The spelling of 68168511 in words is "sixty-eight million, one hundred sixty-eight thousand, five hundred eleven".