77375231135513 has 2 divisors, whose sum is σ = 77375231135514. Its totient is φ = 77375231135512.

The previous prime is 77375231135491. The next prime is 77375231135537. The reversal of 77375231135513 is 31553113257377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77099147094544 + 276084040969 = 8780612^2 + 525437^2 .

It is an emirp because it is prime and its reverse (31553113257377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77375231135513 - 2¹⁶ = 77375231069977 is a prime.

It is a super-3 number, since 3×77375231135513³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77375231135593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38687615567756 + 38687615567757.

It is an arithmetic number, because the mean of its divisors is an integer number (38687615567757).

Almost surely, 2^{77375231135513} is an apocalyptic number.

It is an amenable number.

77375231135513 is a deficient number, since it is larger than the sum of its proper divisors (1).

77375231135513 is an equidigital number, since it uses as much as digits as its factorization.

77375231135513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6945750, while the sum is 53.

The spelling of 77375231135513 in words is "seventy-seven trillion, three hundred seventy-five billion, two hundred thirty-one million, one hundred thirty-five thousand, five hundred thirteen".