4181253561 has 16 divisors (see below), whose sum is σ = 6361868800. Its totient is φ = 2712163824.

The previous prime is 4181253511. The next prime is 4181253577. The reversal of 4181253561 is 1653521814.

4181253561 is a `hidden beast` number, since 41 + 8 + 1 + 2 + 53 + 561 = 666.

It is not a de Polignac number, because 4181253561 - 2⁶ = 4181253497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4181253511) 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, 2091721 + ... + 2093718.

It is an arithmetic number, because the mean of its divisors is an integer number (397616800).

Almost surely, 2^4181253561 is an apocalyptic number.

It is an amenable number.

4181253561 is a deficient number, since it is larger than the sum of its proper divisors (2180615239).

4181253561 is a wasteful number, since it uses less digits than its factorization.

4181253561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185485 (or 4185479 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 4181253561 is about 64662.6133171248. The cubic root of 4181253561 is about 1611.0245861788.

It can be divided in two parts, 4181253 and 561, that added together give a palindrome (4181814).

The spelling of 4181253561 in words is "four billion, one hundred eighty-one million, two hundred fifty-three thousand, five hundred sixty-one".