1649985529 has 2 divisors, whose sum is σ = 1649985530. Its totient is φ = 1649985528.

The previous prime is 1649985527. The next prime is 1649985581. The reversal of 1649985529 is 9255899461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 892635129 + 757350400 = 29877^2 + 27520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649985529 - 2¹ = 1649985527 is a prime.

Together with 1649985527, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1649985527) 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 as a sum of consecutive naturals, namely, 824992764 + 824992765.

It is an arithmetic number, because the mean of its divisors is an integer number (824992765).

Almost surely, 2^1649985529 is an apocalyptic number.

It is an amenable number.

1649985529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649985529 is an equidigital number, since it uses as much as digits as its factorization.

1649985529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 58.

The square root of 1649985529 is about 40620.0138970926. The cubic root of 1649985529 is about 1181.6622959352.

The spelling of 1649985529 in words is "one billion, six hundred forty-nine million, nine hundred eighty-five thousand, five hundred twenty-nine".