41581665 has 12 divisors (see below), whose sum is σ = 72074964. Its totient is φ = 22176864.

The previous prime is 41581649. The next prime is 41581691. The reversal of 41581665 is 56618514.

It can be written as a sum of positive squares in 2 ways, for example, as 30869136 + 10712529 = 5556^2 + 3273^2 .

It is not a de Polignac number, because 41581665 - 2⁴ = 41581649 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461974 + ... + 462063.

It is an arithmetic number, because the mean of its divisors is an integer number (6006247).

Almost surely, 2^41581665 is an apocalyptic number.

41581665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

41581665 is a deficient number, since it is larger than the sum of its proper divisors (30493299).

41581665 is a wasteful number, since it uses less digits than its factorization.

41581665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924048 (or 924045 counting only the distinct ones).

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

The square root of 41581665 is about 6448.3846814532. The cubic root of 41581665 is about 346.4447292263. Note that the first 3 decimals are identical.

The spelling of 41581665 in words is "forty-one million, five hundred eighty-one thousand, six hundred sixty-five".