1646181352 has 16 divisors (see below), whose sum is σ = 3089340900. Its totient is φ = 822357120.

The previous prime is 1646181347. The next prime is 1646181359. The reversal of 1646181352 is 2531816461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1616522436 + 29658916 = 40206^2 + 5446^2 .

It is not an unprimeable number, because it can be changed into a prime (1646181359) 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, 82099 + ... + 100162.

Almost surely, 2^1646181352 is an apocalyptic number.

It is an amenable number.

1646181352 is a deficient number, since it is larger than the sum of its proper divisors (1443159548).

1646181352 is a wasteful number, since it uses less digits than its factorization.

1646181352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183396 (or 183392 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1646181352 is about 40573.1604881848. The cubic root of 1646181352 is about 1180.7534573211.

The spelling of 1646181352 in words is "one billion, six hundred forty-six million, one hundred eighty-one thousand, three hundred fifty-two".