1649106859 has 4 divisors (see below), whose sum is σ = 1651146120. Its totient is φ = 1647067600.

The previous prime is 1649106853. The next prime is 1649106871. The reversal of 1649106859 is 9586019461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1649106859 - 2¹⁷ = 1648975787 is a prime.

It is a super-3 number, since 3×1649106859³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649106853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018417 + ... + 1020034.

It is an arithmetic number, because the mean of its divisors is an integer number (412786530).

Almost surely, 2^1649106859 is an apocalyptic number.

1649106859 is a deficient number, since it is larger than the sum of its proper divisors (2039261).

1649106859 is an equidigital number, since it uses as much as digits as its factorization.

1649106859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039260.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 1649106859 is about 40609.1967293124. The cubic root of 1649106859 is about 1181.4525010504.

The spelling of 1649106859 in words is "one billion, six hundred forty-nine million, one hundred six thousand, eight hundred fifty-nine".