1649166217 has 8 divisors (see below), whose sum is σ = 1722340224. Its totient is φ = 1576114848.

The previous prime is 1649166193. The next prime is 1649166223. The reversal of 1649166217 is 7126619461.

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 1649166217 - 2⁷ = 1649166089 is a prime.

It is a super-2 number, since 2×1649166217² = 5439498422588182178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649166017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2613 + ... + 57490.

It is an arithmetic number, because the mean of its divisors is an integer number (215292528).

Almost surely, 2^1649166217 is an apocalyptic number.

It is an amenable number.

1649166217 is a deficient number, since it is larger than the sum of its proper divisors (73174007).

1649166217 is a wasteful number, since it uses less digits than its factorization.

1649166217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61319.

The product of its digits is 108864, while the sum is 43.

The square root of 1649166217 is about 40609.9275670371. The cubic root of 1649166217 is about 1181.4666759588.

The spelling of 1649166217 in words is "one billion, six hundred forty-nine million, one hundred sixty-six thousand, two hundred seventeen".