5215644647 has 4 divisors (see below), whose sum is σ = 5490152280. Its totient is φ = 4941137016.

The previous prime is 5215644619. The next prime is 5215644649. The reversal of 5215644647 is 7464465125.

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

It is a cyclic number.

It is not a de Polignac number, because 5215644647 - 2⁶ = 5215644583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5215644598 and 5215644607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215644649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137253788 + ... + 137253825.

It is an arithmetic number, because the mean of its divisors is an integer number (1372538070).

Almost surely, 2^5215644647 is an apocalyptic number.

5215644647 is a deficient number, since it is larger than the sum of its proper divisors (274507633).

5215644647 is a wasteful number, since it uses less digits than its factorization.

5215644647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274507632.

The product of its digits is 806400, while the sum is 44.

The square root of 5215644647 is about 72219.4201513693. The cubic root of 5215644647 is about 1734.2139077204.

The spelling of 5215644647 in words is "five billion, two hundred fifteen million, six hundred forty-four thousand, six hundred forty-seven".