6216638247 has 8 divisors (see below), whose sum is σ = 9209834480. Its totient is φ = 4144425480.

The previous prime is 6216638231. The next prime is 6216638257. The reversal of 6216638247 is 7428366126.

6216638247 is a `hidden beast` number, since 6 + 2 + 1 + 6 + 638 + 2 + 4 + 7 = 666.

It is not a de Polignac number, because 6216638247 - 2⁴ = 6216638231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6216638257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115122904 + ... + 115122957.

It is an arithmetic number, because the mean of its divisors is an integer number (1151229310).

Almost surely, 2^6216638247 is an apocalyptic number.

6216638247 is a deficient number, since it is larger than the sum of its proper divisors (2993196233).

6216638247 is a wasteful number, since it uses less digits than its factorization.

6216638247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230245870 (or 230245864 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 6216638247 is about 78845.6609269020. The cubic root of 6216638247 is about 1838.7324137168.

The spelling of 6216638247 in words is "six billion, two hundred sixteen million, six hundred thirty-eight thousand, two hundred forty-seven".