68188355 has 4 divisors (see below), whose sum is σ = 81826032. Its totient is φ = 54550680.

The previous prime is 68188333. The next prime is 68188357. The reversal of 68188355 is 55388186.

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

It is not a de Polignac number, because 68188355 - 2⁶ = 68188291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68188357) 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, 6818831 + ... + 6818840.

It is an arithmetic number, because the mean of its divisors is an integer number (20456508).

Almost surely, 2^68188355 is an apocalyptic number.

68188355 is a deficient number, since it is larger than the sum of its proper divisors (13637677).

68188355 is a wasteful number, since it uses less digits than its factorization.

68188355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13637676.

The product of its digits is 230400, while the sum is 44.

The square root of 68188355 is about 8257.6240529586. The cubic root of 68188355 is about 408.5420255825.

The spelling of 68188355 in words is "sixty-eight million, one hundred eighty-eight thousand, three hundred fifty-five".