5649857905 has 8 divisors (see below), whose sum is σ = 6791266152. Its totient is φ = 4512261888.

The previous prime is 5649857903. The next prime is 5649857951. The reversal of 5649857905 is 5097589465.

It can be written as a sum of positive squares in 4 ways, for example, as 1317980416 + 4331877489 = 36304^2 + 65817^2 .

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 5649857905 - 2¹ = 5649857903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5649857905.

It is not an unprimeable number, because it can be changed into a prime (5649857903) 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 7 ways as a sum of consecutive naturals, for example, 949794 + ... + 955723.

It is an arithmetic number, because the mean of its divisors is an integer number (848908269).

Almost surely, 2^5649857905 is an apocalyptic number.

It is an amenable number.

5649857905 is a deficient number, since it is larger than the sum of its proper divisors (1141408247).

5649857905 is a wasteful number, since it uses less digits than its factorization.

5649857905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906115.

The product of its (nonzero) digits is 13608000, while the sum is 58.

The square root of 5649857905 is about 75165.5366840416. The cubic root of 5649857905 is about 1781.0625630944.

The spelling of 5649857905 in words is "five billion, six hundred forty-nine million, eight hundred fifty-seven thousand, nine hundred five".