41778161 has 4 divisors (see below), whose sum is σ = 41804532. Its totient is φ = 41751792.

The previous prime is 41778157. The next prime is 41778181. The reversal of 41778161 is 16187714.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26419600 + 15358561 = 5140^2 + 3919^2 .

It is a cyclic number.

It is not a de Polignac number, because 41778161 - 2² = 41778157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41778101) 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, 10646 + ... + 14031.

It is an arithmetic number, because the mean of its divisors is an integer number (10451133).

Almost surely, 2^41778161 is an apocalyptic number.

It is an amenable number.

41778161 is a deficient number, since it is larger than the sum of its proper divisors (26371).

41778161 is a wasteful number, since it uses less digits than its factorization.

41778161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26370.

The product of its digits is 9408, while the sum is 35.

The square root of 41778161 is about 6463.6027879194. The cubic root of 41778161 is about 346.9895851835.

The spelling of 41778161 in words is "forty-one million, seven hundred seventy-eight thousand, one hundred sixty-one".