1641144071 has 8 divisors (see below), whose sum is σ = 1876341120. Its totient is φ = 1406134008.

The previous prime is 1641144053. The next prime is 1641144077. The reversal of 1641144071 is 1704411461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641144071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641144077) 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 7 ways as a sum of consecutive naturals, for example, 27401 + ... + 63506.

It is an arithmetic number, because the mean of its divisors is an integer number (234542640).

Almost surely, 2^1641144071 is an apocalyptic number.

1641144071 is a deficient number, since it is larger than the sum of its proper divisors (235197049).

1641144071 is an equidigital number, since it uses as much as digits as its factorization.

1641144071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93493.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1641144071 is about 40511.0364098476. The cubic root of 1641144071 is about 1179.5478663767.

The spelling of 1641144071 in words is "one billion, six hundred forty-one million, one hundred forty-four thousand, seventy-one".