68411855 has 4 divisors (see below), whose sum is σ = 82094232. Its totient is φ = 54729480.

The previous prime is 68411851. The next prime is 68411873. The reversal of 68411855 is 55811486.

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

It is not a de Polignac number, because 68411855 - 2² = 68411851 is a prime.

It is a super-3 number, since 3×68411855³ (a number of 24 digits) contains 333 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 (68411851) 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, 6841181 + ... + 6841190.

It is an arithmetic number, because the mean of its divisors is an integer number (20523558).

Almost surely, 2^68411855 is an apocalyptic number.

68411855 is a deficient number, since it is larger than the sum of its proper divisors (13682377).

68411855 is a wasteful number, since it uses less digits than its factorization.

68411855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13682376.

The product of its digits is 38400, while the sum is 38.

The square root of 68411855 is about 8271.1459302808. The cubic root of 68411855 is about 408.9878962549.

The spelling of 68411855 in words is "sixty-eight million, four hundred eleven thousand, eight hundred fifty-five".