1605541216 has 24 divisors (see below), whose sum is σ = 3178579320. Its totient is φ = 798283008.

The previous prime is 1605541207. The next prime is 1605541229. The reversal of 1605541216 is 6121455061.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 134421 + ... + 145876.

It is an arithmetic number, because the mean of its divisors is an integer number (132440805).

Almost surely, 2^1605541216 is an apocalyptic number.

1605541216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1605541216 is a deficient number, since it is larger than the sum of its proper divisors (1573038104).

1605541216 is a wasteful number, since it uses less digits than its factorization.

1605541216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280486 (or 280478 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1605541216 is about 40069.2053327739. The cubic root of 1605541216 is about 1170.9557573817.

Adding to 1605541216 its reverse (6121455061), we get a palindrome (7726996277).

The spelling of 1605541216 in words is "one billion, six hundred five million, five hundred forty-one thousand, two hundred sixteen".