4181898561 has 16 divisors (see below), whose sum is σ = 5908940928. Its totient is φ = 2621676800.

The previous prime is 4181898557. The next prime is 4181898593. The reversal of 4181898561 is 1658981814.

4181898561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4181898561 - 2² = 4181898557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (4181898541) 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, 25516 + ... + 94946.

It is an arithmetic number, because the mean of its divisors is an integer number (369308808).

Almost surely, 2^4181898561 is an apocalyptic number.

It is an amenable number.

4181898561 is a deficient number, since it is larger than the sum of its proper divisors (1727042367).

4181898561 is a wasteful number, since it uses less digits than its factorization.

4181898561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70632.

The product of its digits is 552960, while the sum is 51.

The square root of 4181898561 is about 64667.6005508168. The cubic root of 4181898561 is about 1611.1074207814.

The spelling of 4181898561 in words is "four billion, one hundred eighty-one million, eight hundred ninety-eight thousand, five hundred sixty-one".