84721163759 has 2 divisors, whose sum is σ = 84721163760. Its totient is φ = 84721163758.

The previous prime is 84721163749. The next prime is 84721163797. The reversal of 84721163759 is 95736112748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84721163759 - 2³² = 80426196463 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84721163759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84721163749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42360581879 + 42360581880.

It is an arithmetic number, because the mean of its divisors is an integer number (42360581880).

Almost surely, 2^84721163759 is an apocalyptic number.

84721163759 is a deficient number, since it is larger than the sum of its proper divisors (1).

84721163759 is an equidigital number, since it uses as much as digits as its factorization.

84721163759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 84721163759 in words is "eighty-four billion, seven hundred twenty-one million, one hundred sixty-three thousand, seven hundred fifty-nine".