1641652871 has 2 divisors, whose sum is σ = 1641652872. Its totient is φ = 1641652870.

The previous prime is 1641652867. The next prime is 1641652891. The reversal of 1641652871 is 1782561461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1641652871 - 2² = 1641652867 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641652891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820826435 + 820826436.

It is an arithmetic number, because the mean of its divisors is an integer number (820826436).

Almost surely, 2^1641652871 is an apocalyptic number.

1641652871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641652871 is an equidigital number, since it uses as much as digits as its factorization.

1641652871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The square root of 1641652871 is about 40517.3156934168. The cubic root of 1641652871 is about 1179.6697512565.

The spelling of 1641652871 in words is "one billion, six hundred forty-one million, six hundred fifty-two thousand, eight hundred seventy-one".