6249516409 has 4 divisors (see below), whose sum is σ = 6289322404. Its totient is φ = 6209710416.

The previous prime is 6249516373. The next prime is 6249516439. The reversal of 6249516409 is 9046159426.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3032925184 + 3216591225 = 55072^2 + 56715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6249516409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6249516439) 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, 19902762 + ... + 19903075.

It is an arithmetic number, because the mean of its divisors is an integer number (1572330601).

Almost surely, 2^6249516409 is an apocalyptic number.

It is an amenable number.

6249516409 is a deficient number, since it is larger than the sum of its proper divisors (39805995).

6249516409 is a wasteful number, since it uses less digits than its factorization.

6249516409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39805994.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 6249516409 is about 79053.8829470128. The cubic root of 6249516409 is about 1841.9682397088.

The spelling of 6249516409 in words is "six billion, two hundred forty-nine million, five hundred sixteen thousand, four hundred nine".