82517407787 has 2 divisors, whose sum is σ = 82517407788. Its totient is φ = 82517407786.

The previous prime is 82517407727. The next prime is 82517407793. The reversal of 82517407787 is 78770471528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82517407787 - 2⁶ = 82517407723 is a prime.

It is not a weakly prime, because it can be changed into another prime (82517407727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41258703893 + 41258703894.

It is an arithmetic number, because the mean of its divisors is an integer number (41258703894).

Almost surely, 2^82517407787 is an apocalyptic number.

82517407787 is a deficient number, since it is larger than the sum of its proper divisors (1).

82517407787 is an equidigital number, since it uses as much as digits as its factorization.

82517407787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6146560, while the sum is 56.

The spelling of 82517407787 in words is "eighty-two billion, five hundred seventeen million, four hundred seven thousand, seven hundred eighty-seven".