1649206899 has 10 divisors (see below), whose sum is σ = 2463630180. Its totient is φ = 1099471212.

The previous prime is 1649206879. The next prime is 1649206903. The reversal of 1649206899 is 9986029461.

1649206899 is a `hidden beast` number, since 1 + 6 + 492 + 0 + 68 + 99 = 666.

1649206899 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1649206899 - 2¹² = 1649202803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649206879) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10180209 + ... + 10180370.

It is an arithmetic number, because the mean of its divisors is an integer number (246363018).

Almost surely, 2^1649206899 is an apocalyptic number.

1649206899 is a deficient number, since it is larger than the sum of its proper divisors (814423281).

1649206899 is an equidigital number, since it uses as much as digits as its factorization.

1649206899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20360591 (or 20360582 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 1649206899 is about 40610.4284513227. The cubic root of 1649206899 is about 1181.4763907734.

The spelling of 1649206899 in words is "one billion, six hundred forty-nine million, two hundred six thousand, eight hundred ninety-nine".