6839694708961 has 3 divisors (see below), whose sum is σ = 6839697324243. Its totient is φ = 6839692093680.

The previous prime is 6839694708911. The next prime is 6839694708971. The reversal of 6839694708961 is 1698074969386.

The square root of 6839694708961 is 2615281.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 6766080166561 + 73614542400 = 2601169^2 + 271320^2 .

It is not a de Polignac number, because 6839694708961 - 2²¹ = 6839692611809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6839694708911) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1307641 + ... + 3922921.

It is an arithmetic number, because the mean of its divisors is an integer number (2279899108081).

Almost surely, 2^{6839694708961} is an apocalyptic number.

6839694708961 is the 2615281-st square number.

6839694708961 is the 1307641-st centered octagonal number.

It is an amenable number.

6839694708961 is a deficient number, since it is larger than the sum of its proper divisors (2615282).

6839694708961 is an frugal number, since it uses more digits than its factorization.

6839694708961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230562 (or 2615281 counting only the distinct ones).

The product of its (nonzero) digits is 846526464, while the sum is 76.

The spelling of 6839694708961 in words is "six trillion, eight hundred thirty-nine billion, six hundred ninety-four million, seven hundred eight thousand, nine hundred sixty-one".