4161975561 has 16 divisors (see below), whose sum is σ = 6169947520. Its totient is φ = 2772824400.

The previous prime is 4161975553. The next prime is 4161975563. The reversal of 4161975561 is 1655791614.

4161975561 is a `hidden beast` number, since 4 + 1 + 6 + 1 + 97 + 556 + 1 = 666.

It is not a de Polignac number, because 4161975561 - 2³ = 4161975553 is a prime.

It is a super-2 number, since 2×4161975561² = 34644081140722529442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4161975563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8290 + ... + 91611.

It is an arithmetic number, because the mean of its divisors is an integer number (385621720).

Almost surely, 2^4161975561 is an apocalyptic number.

It is an amenable number.

4161975561 is a deficient number, since it is larger than the sum of its proper divisors (2007971959).

4161975561 is a wasteful number, since it uses less digits than its factorization.

4161975561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101453 (or 101447 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 4161975561 is about 64513.3750551000. The cubic root of 4161975561 is about 1608.5448525363.

The spelling of 4161975561 in words is "four billion, one hundred sixty-one million, nine hundred seventy-five thousand, five hundred sixty-one".