82440243779 has 2 divisors, whose sum is σ = 82440243780. Its totient is φ = 82440243778.

The previous prime is 82440243763. The next prime is 82440243799. The reversal of 82440243779 is 97734204428.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82440243779 - 2⁴ = 82440243763 is a prime.

It is not a weakly prime, because it can be changed into another prime (82440243799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41220121889 + 41220121890.

It is an arithmetic number, because the mean of its divisors is an integer number (41220121890).

Almost surely, 2^82440243779 is an apocalyptic number.

82440243779 is a deficient number, since it is larger than the sum of its proper divisors (1).

82440243779 is an equidigital number, since it uses as much as digits as its factorization.

82440243779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2709504, while the sum is 50.

The spelling of 82440243779 in words is "eighty-two billion, four hundred forty million, two hundred forty-three thousand, seven hundred seventy-nine".