4161778605 has 12 divisors (see below), whose sum is σ = 7213749660. Its totient is φ = 2219615232.

The previous prime is 4161778597. The next prime is 4161778657. The reversal of 4161778605 is 5068771614.

4161778605 is a `hidden beast` number, since 416 + 177 + 8 + 60 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 771395076 + 3390383529 = 27774^2 + 58227^2 .

It is not a de Polignac number, because 4161778605 - 2³ = 4161778597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 92483969 = 4161778605 / (4 + 1 + 6 + 1 + 7 + 7 + 8 + 6 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46241940 + ... + 46242029.

It is an arithmetic number, because the mean of its divisors is an integer number (601145805).

Almost surely, 2^4161778605 is an apocalyptic number.

4161778605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4161778605 is a deficient number, since it is larger than the sum of its proper divisors (3051971055).

4161778605 is a wasteful number, since it uses less digits than its factorization.

4161778605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92483980 (or 92483977 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 4161778605 is about 64511.8485628803. The cubic root of 4161778605 is about 1608.5194785640.

The spelling of 4161778605 in words is "four billion, one hundred sixty-one million, seven hundred seventy-eight thousand, six hundred five".