1629945841 has 8 divisors (see below), whose sum is σ = 1687833000. Its totient is φ = 1572170880.

The previous prime is 1629945833. The next prime is 1629945871. The reversal of 1629945841 is 1485499261.

It can be written as a sum of positive squares in 4 ways, for example, as 659000241 + 970945600 = 25671^2 + 31160^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1629945841 - 2³ = 1629945833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1629945871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2085 + ... + 57133.

It is an arithmetic number, because the mean of its divisors is an integer number (210979125).

Almost surely, 2^1629945841 is an apocalyptic number.

It is an amenable number.

1629945841 is a deficient number, since it is larger than the sum of its proper divisors (57887159).

1629945841 is a wasteful number, since it uses less digits than its factorization.

1629945841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56099.

The product of its digits is 622080, while the sum is 49.

The square root of 1629945841 is about 40372.5877421797. The cubic root of 1629945841 is about 1176.8588873572.

The spelling of 1629945841 in words is "one billion, six hundred twenty-nine million, nine hundred forty-five thousand, eight hundred forty-one".