7205921716879 has 2 divisors, whose sum is σ = 7205921716880. Its totient is φ = 7205921716878.

The previous prime is 7205921716817. The next prime is 7205921716943. The reversal of 7205921716879 is 9786171295027.

It is an a-pointer prime, because the next prime (7205921716943) can be obtained adding 7205921716879 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7205921716879 - 2¹⁵ = 7205921684111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7205921716879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7205921717879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3602960858439 + 3602960858440.

It is an arithmetic number, because the mean of its divisors is an integer number (3602960858440).

Almost surely, 2^{7205921716879} is an apocalyptic number.

7205921716879 is a deficient number, since it is larger than the sum of its proper divisors (1).

7205921716879 is an equidigital number, since it uses as much as digits as its factorization.

7205921716879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26671680, while the sum is 64.

The spelling of 7205921716879 in words is "seven trillion, two hundred five billion, nine hundred twenty-one million, seven hundred sixteen thousand, eight hundred seventy-nine".