6838643767247 has 4 divisors (see below), whose sum is σ = 6838812734040. Its totient is φ = 6838474800456.

The previous prime is 6838643767231. The next prime is 6838643767273. The reversal of 6838643767247 is 7427673468386.

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 6838643767247 - 2⁴ = 6838643767231 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 (6838643767147) 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, 84422672 + ... + 84503637.

It is an arithmetic number, because the mean of its divisors is an integer number (1709703183510).

Almost surely, 2^{6838643767247} is an apocalyptic number.

6838643767247 is a deficient number, since it is larger than the sum of its proper divisors (168966793).

6838643767247 is a wasteful number, since it uses less digits than its factorization.

6838643767247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168966792.

The product of its digits is 1365590016, while the sum is 71.

The spelling of 6838643767247 in words is "six trillion, eight hundred thirty-eight billion, six hundred forty-three million, seven hundred sixty-seven thousand, two hundred forty-seven".