1643741151 has 12 divisors (see below), whose sum is σ = 2373212808. Its totient is φ = 1011532704.

The previous prime is 1643741137. The next prime is 1643741171. The reversal of 1643741151 is 1511473461.

It is not a de Polignac number, because 1643741151 - 2⁹ = 1643740639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643741111) 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 11 ways as a sum of consecutive naturals, for example, 1620540 + ... + 1621553.

It is an arithmetic number, because the mean of its divisors is an integer number (197767734).

Almost surely, 2^1643741151 is an apocalyptic number.

1643741151 is a deficient number, since it is larger than the sum of its proper divisors (729471657).

1643741151 is a wasteful number, since it uses less digits than its factorization.

1643741151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242122 (or 3242109 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 1643741151 is about 40543.0777198772. The cubic root of 1643741151 is about 1180.1697426502.

The spelling of 1643741151 in words is "one billion, six hundred forty-three million, seven hundred forty-one thousand, one hundred fifty-one".