77834410315489 has 2 divisors, whose sum is σ = 77834410315490. Its totient is φ = 77834410315488.

The previous prime is 77834410315433. The next prime is 77834410315553. The reversal of 77834410315489 is 98451301443877.

It is an a-pointer prime, because the next prime (77834410315553) can be obtained adding 77834410315489 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52549523301025 + 25284887014464 = 7249105^2 + 5028408^2 .

It is a cyclic number.

It is not a de Polignac number, because 77834410315489 - 2²¹ = 77834408218337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77834410315489.

It is not a weakly prime, because it can be changed into another prime (77834410315789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38917205157744 + 38917205157745.

It is an arithmetic number, because the mean of its divisors is an integer number (38917205157745).

Almost surely, 2^{77834410315489} is an apocalyptic number.

It is an amenable number.

77834410315489 is a deficient number, since it is larger than the sum of its proper divisors (1).

77834410315489 is an equidigital number, since it uses as much as digits as its factorization.

77834410315489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 77834410315489 in words is "seventy-seven trillion, eight hundred thirty-four billion, four hundred ten million, three hundred fifteen thousand, four hundred eighty-nine".