1641050665 has 8 divisors (see below), whose sum is σ = 1969930368. Its totient is φ = 1312394160.

The previous prime is 1641050657. The next prime is 1641050683. The reversal of 1641050665 is 5660501461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1641050665 - 2³ = 1641050657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641050665.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39171 + ... + 69400.

It is an arithmetic number, because the mean of its divisors is an integer number (246241296).

Almost surely, 2^1641050665 is an apocalyptic number.

It is an amenable number.

1641050665 is a deficient number, since it is larger than the sum of its proper divisors (328879703).

1641050665 is a wasteful number, since it uses less digits than its factorization.

1641050665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111599.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1641050665 is about 40509.8835471049. The cubic root of 1641050665 is about 1179.5254878948.

The spelling of 1641050665 in words is "one billion, six hundred forty-one million, fifty thousand, six hundred sixty-five".