4082081645 has 6 divisors (see below), whose sum is σ = 4898669418. Its totient is φ = 3265551024.

The previous prime is 4082081639. The next prime is 4082081651. The reversal of 4082081645 is 5461802804.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4082081639) and next prime (4082081651).

It can be written as a sum of positive squares in 3 ways, for example, as 684240964 + 3397840681 = 26158^2 + 58291^2 .

It is not a de Polignac number, because 4082081645 - 2¹⁰ = 4082080621 is a prime.

It is a super-3 number, since 3×4082081645³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4082081599 and 4082081608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128579 + ... + 157151.

It is an arithmetic number, because the mean of its divisors is an integer number (816444903).

Almost surely, 2^4082081645 is an apocalyptic number.

It is an amenable number.

4082081645 is a deficient number, since it is larger than the sum of its proper divisors (816587773).

4082081645 is an frugal number, since it uses more digits than its factorization.

4082081645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57151 (or 28578 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 4082081645 is about 63891.1703211015. The cubic root of 4082081645 is about 1598.1856575714.

The spelling of 4082081645 in words is "four billion, eighty-two million, eighty-one thousand, six hundred forty-five".