1605500541 has 16 divisors (see below), whose sum is σ = 2417513920. Its totient is φ = 1052786160.

The previous prime is 1605500537. The next prime is 1605500557. The reversal of 1605500541 is 1450055061.

It is a happy number.

1605500541 is a `hidden beast` number, since 1 + 60 + 550 + 0 + 54 + 1 = 666.

It is not a de Polignac number, because 1605500541 - 2² = 1605500537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605500341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485755 + ... + 489048.

It is an arithmetic number, because the mean of its divisors is an integer number (151094620).

Almost surely, 2^1605500541 is an apocalyptic number.

It is an amenable number.

1605500541 is a deficient number, since it is larger than the sum of its proper divisors (812013379).

1605500541 is an equidigital number, since it uses as much as digits as its factorization.

1605500541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974873 (or 974867 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1605500541 is about 40068.6977702046. The cubic root of 1605500541 is about 1170.9458689140.

The spelling of 1605500541 in words is "one billion, six hundred five million, five hundred thousand, five hundred forty-one".