77828257886117 has 2 divisors, whose sum is σ = 77828257886118. Its totient is φ = 77828257886116.

The previous prime is 77828257886069. The next prime is 77828257886167. The reversal of 77828257886117 is 71168875282877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48819412693921 + 29008845192196 = 6987089^2 + 5385986^2 .

It is a cyclic number.

It is not a de Polignac number, because 77828257886117 - 2¹⁰ = 77828257885093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77828257886167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38914128943058 + 38914128943059.

It is an arithmetic number, because the mean of its divisors is an integer number (38914128943059).

Almost surely, 2^{77828257886117} is an apocalyptic number.

It is an amenable number.

77828257886117 is a deficient number, since it is larger than the sum of its proper divisors (1).

77828257886117 is an equidigital number, since it uses as much as digits as its factorization.

77828257886117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1180139520, while the sum is 77.

The spelling of 77828257886117 in words is "seventy-seven trillion, eight hundred twenty-eight billion, two hundred fifty-seven million, eight hundred eighty-six thousand, one hundred seventeen".