77840784373523 has 2 divisors, whose sum is σ = 77840784373524. Its totient is φ = 77840784373522.

The previous prime is 77840784373441. The next prime is 77840784373621. The reversal of 77840784373523 is 32537348704877.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77840784373523 - 2⁸ = 77840784373267 is a prime.

It is not a weakly prime, because it can be changed into another prime (77840784373123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38920392186761 + 38920392186762.

It is an arithmetic number, because the mean of its divisors is an integer number (38920392186762).

Almost surely, 2^{77840784373523} is an apocalyptic number.

77840784373523 is a deficient number, since it is larger than the sum of its proper divisors (1).

77840784373523 is an equidigital number, since it uses as much as digits as its factorization.

77840784373523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663828480, while the sum is 68.

The spelling of 77840784373523 in words is "seventy-seven trillion, eight hundred forty billion, seven hundred eighty-four million, three hundred seventy-three thousand, five hundred twenty-three".