6449273949 has 16 divisors (see below), whose sum is σ = 9081121280. Its totient is φ = 4059946800.

The previous prime is 6449273927. The next prime is 6449273981. The reversal of 6449273949 is 9493729446.

It is not a de Polignac number, because 6449273949 - 2¹⁵ = 6449241181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449273249) 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 15 ways as a sum of consecutive naturals, for example, 166777 + ... + 201774.

It is an arithmetic number, because the mean of its divisors is an integer number (567570080).

Almost surely, 2^6449273949 is an apocalyptic number.

It is an amenable number.

6449273949 is a deficient number, since it is larger than the sum of its proper divisors (2631847331).

6449273949 is a wasteful number, since it uses less digits than its factorization.

6449273949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368880.

The product of its digits is 11757312, while the sum is 57.

The square root of 6449273949 is about 80307.3716977464. The cubic root of 6449273949 is about 1861.3881367876.

The spelling of 6449273949 in words is "six billion, four hundred forty-nine million, two hundred seventy-three thousand, nine hundred forty-nine".