6921255592879 has 2 divisors, whose sum is σ = 6921255592880. Its totient is φ = 6921255592878.

The previous prime is 6921255592877. The next prime is 6921255592891. The reversal of 6921255592879 is 9782955521296.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6921255592879 - 2¹ = 6921255592877 is a prime.

Together with 6921255592877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6921255592871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460627796439 + 3460627796440.

It is an arithmetic number, because the mean of its divisors is an integer number (3460627796440).

Almost surely, 2^{6921255592879} is an apocalyptic number.

6921255592879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6921255592879 is an equidigital number, since it uses as much as digits as its factorization.

6921255592879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944000, while the sum is 70.

The spelling of 6921255592879 in words is "six trillion, nine hundred twenty-one billion, two hundred fifty-five million, five hundred ninety-two thousand, eight hundred seventy-nine".