3645147181 has 16 divisors (see below), whose sum is σ = 4039757568. Its totient is φ = 3267950400.

The previous prime is 3645147173. The next prime is 3645147193. The reversal of 3645147181 is 1817415463.

It is not a de Polignac number, because 3645147181 - 2³ = 3645147173 is a prime.

It is a super-2 number, since 2×3645147181² = 26574195942304493522, 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 (3645147151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57271 + ... + 102811.

It is an arithmetic number, because the mean of its divisors is an integer number (252484848).

Almost surely, 2^3645147181 is an apocalyptic number.

It is an amenable number.

3645147181 is a deficient number, since it is larger than the sum of its proper divisors (394610387).

3645147181 is a wasteful number, since it uses less digits than its factorization.

3645147181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45732.

The product of its digits is 80640, while the sum is 40.

The square root of 3645147181 is about 60375.0542939714. The cubic root of 3645147181 is about 1538.9990658018. Note that the first 3 decimals are identical.

The spelling of 3645147181 in words is "three billion, six hundred forty-five million, one hundred forty-seven thousand, one hundred eighty-one".