5216813649 has 6 divisors (see below), whose sum is σ = 7535397506. Its totient is φ = 3477875760.

The previous prime is 5216813639. The next prime is 5216813653. The reversal of 5216813649 is 9463186125.

5216813649 is a `hidden beast` number, since 521 + 6 + 81 + 3 + 6 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2730794049 + 2486019600 = 52257^2 + 49860^2 .

It is not a de Polignac number, because 5216813649 - 2⁷ = 5216813521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5216813639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289822972 + ... + 289822989.

Almost surely, 2^5216813649 is an apocalyptic number.

It is an amenable number.

5216813649 is a deficient number, since it is larger than the sum of its proper divisors (2318583857).

5216813649 is a wasteful number, since it uses less digits than its factorization.

5216813649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579645967 (or 579645964 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 5216813649 is about 72227.5131026952. The cubic root of 5216813649 is about 1734.3434633311.

The spelling of 5216813649 in words is "five billion, two hundred sixteen million, eight hundred thirteen thousand, six hundred forty-nine".