1641600663 has 4 divisors (see below), whose sum is σ = 2188800888. Its totient is φ = 1094400440.

The previous prime is 1641600659. The next prime is 1641600673. The reversal of 1641600663 is 3660061461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1641600663 - 2² = 1641600659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641600673) by changing a digit.

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, 273600108 + ... + 273600113.

It is an arithmetic number, because the mean of its divisors is an integer number (547200222).

Almost surely, 2^1641600663 is an apocalyptic number.

1641600663 is a deficient number, since it is larger than the sum of its proper divisors (547200225).

1641600663 is an equidigital number, since it uses as much as digits as its factorization.

1641600663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547200224.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1641600663 is about 40516.6714205400. The cubic root of 1641600663 is about 1179.6572458009.

The spelling of 1641600663 in words is "one billion, six hundred forty-one million, six hundred thousand, six hundred sixty-three".