6839905597249 has 4 divisors (see below), whose sum is σ = 6851926521540. Its totient is φ = 6827884672960.

The previous prime is 6839905597223. The next prime is 6839905597321. The reversal of 6839905597249 is 9427955099386.

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 470177633025 + 6369727964224 = 685695^2 + 2523832^2 .

It is a cyclic number.

It is not a de Polignac number, because 6839905597249 - 2³³ = 6831315662657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6839905595249) 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, 6010461292 + ... + 6010462429.

It is an arithmetic number, because the mean of its divisors is an integer number (1712981630385).

Almost surely, 2^{6839905597249} is an apocalyptic number.

It is an amenable number.

6839905597249 is a deficient number, since it is larger than the sum of its proper divisors (12020924291).

6839905597249 is a wasteful number, since it uses less digits than its factorization.

6839905597249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12020924290.

The product of its (nonzero) digits is 1322697600, while the sum is 76.

The spelling of 6839905597249 in words is "six trillion, eight hundred thirty-nine billion, nine hundred five million, five hundred ninety-seven thousand, two hundred forty-nine".