1649433471 has 16 divisors (see below), whose sum is σ = 2581353984. Its totient is φ = 917059104.

The previous prime is 1649433469. The next prime is 1649433497. The reversal of 1649433471 is 1743349461.

It is not a de Polignac number, because 1649433471 - 2¹ = 1649433469 is a prime.

It is a super-3 number, since 3×1649433471³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649433971) 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 15 ways as a sum of consecutive naturals, for example, 1060635 + ... + 1062188.

It is an arithmetic number, because the mean of its divisors is an integer number (161334624).

Almost surely, 2^1649433471 is an apocalyptic number.

1649433471 is a deficient number, since it is larger than the sum of its proper divisors (931920513).

1649433471 is a wasteful number, since it uses less digits than its factorization.

1649433471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122870.

The product of its digits is 217728, while the sum is 42.

The square root of 1649433471 is about 40613.2179345592. The cubic root of 1649433471 is about 1181.5304929828.

The spelling of 1649433471 in words is "one billion, six hundred forty-nine million, four hundred thirty-three thousand, four hundred seventy-one".