3654442181 has 8 divisors (see below), whose sum is σ = 3937778040. Its totient is φ = 3371424192.

The previous prime is 3654442157. The next prime is 3654442201. The reversal of 3654442181 is 1812444563.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 174504100 + 3479938081 = 13210^2 + 58991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3654442181 - 2¹⁸ = 3654180037 is a prime.

It is a super-2 number, since 2×3654442181² = 26709895308544073522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654442151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55310 + ... + 101823.

It is an arithmetic number, because the mean of its divisors is an integer number (492222255).

Almost surely, 2^3654442181 is an apocalyptic number.

It is an amenable number.

3654442181 is a deficient number, since it is larger than the sum of its proper divisors (283335859).

3654442181 is a wasteful number, since it uses less digits than its factorization.

3654442181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158935.

The product of its digits is 92160, while the sum is 38.

The square root of 3654442181 is about 60451.9824406115. The cubic root of 3654442181 is about 1540.3060870477.

The spelling of 3654442181 in words is "three billion, six hundred fifty-four million, four hundred forty-two thousand, one hundred eighty-one".