77378516113 has 2 divisors, whose sum is σ = 77378516114. Its totient is φ = 77378516112.

The previous prime is 77378516071. The next prime is 77378516141. The reversal of 77378516113 is 31161587377.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41196009024 + 36182507089 = 202968^2 + 190217^2 .

It is an emirp because it is prime and its reverse (31161587377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77378516113 - 2²¹ = 77376418961 is a prime.

It is not a weakly prime, because it can be changed into another prime (57378516113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38689258056 + 38689258057.

It is an arithmetic number, because the mean of its divisors is an integer number (38689258057).

Almost surely, 2^77378516113 is an apocalyptic number.

It is an amenable number.

77378516113 is a deficient number, since it is larger than the sum of its proper divisors (1).

77378516113 is an equidigital number, since it uses as much as digits as its factorization.

77378516113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 49.

The spelling of 77378516113 in words is "seventy-seven billion, three hundred seventy-eight million, five hundred sixteen thousand, one hundred thirteen".