68495811 has 4 divisors (see below), whose sum is σ = 91327752. Its totient is φ = 45663872.

The previous prime is 68495809. The next prime is 68495831. The reversal of 68495811 is 11859486.

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 68495811 - 2¹ = 68495809 is a prime.

It is a super-2 number, since 2×68495811² = 9383352249095442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68495831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11415966 + ... + 11415971.

It is an arithmetic number, because the mean of its divisors is an integer number (22831938).

Almost surely, 2^68495811 is an apocalyptic number.

68495811 is a deficient number, since it is larger than the sum of its proper divisors (22831941).

68495811 is a wasteful number, since it uses less digits than its factorization.

68495811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22831940.

The product of its digits is 69120, while the sum is 42.

The square root of 68495811 is about 8276.2196080094. The cubic root of 68495811 is about 409.1551331132.

The spelling of 68495811 in words is "sixty-eight million, four hundred ninety-five thousand, eight hundred eleven".