168945778 has 8 divisors (see below), whose sum is σ = 256988160. Its totient is φ = 83283060.

The previous prime is 168945769. The next prime is 168945781. The reversal of 168945778 is 877549861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594738 + ... + 595021.

It is an arithmetic number, because the mean of its divisors is an integer number (32123520).

Almost surely, 2^168945778 is an apocalyptic number.

168945778 is a deficient number, since it is larger than the sum of its proper divisors (88042382).

168945778 is a wasteful number, since it uses less digits than its factorization.

168945778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189832.

The product of its digits is 3386880, while the sum is 55.

The square root of 168945778 is about 12997.9143711597. The cubic root of 168945778 is about 552.8183465958.

The spelling of 168945778 in words is "one hundred sixty-eight million, nine hundred forty-five thousand, seven hundred seventy-eight".