591640718626877 has 2 divisors, whose sum is σ = 591640718626878. Its totient is φ = 591640718626876.

The previous prime is 591640718626787. The next prime is 591640718626879. The reversal of 591640718626877 is 778626817046195.

Together with previous prime (591640718626787) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578011080343321 + 13629638283556 = 24041861^2 + 3691834^2 .

It is a cyclic number.

It is not a de Polignac number, because 591640718626877 - 2⁴⁰ = 590541206999101 is a prime.

It is a super-2 number, since 2×591640718626877² (a number of 30 digits) contains 22 as substring.

Together with 591640718626879, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 591640718626798 and 591640718626807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591640718626879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295820359313438 + 295820359313439.

It is an arithmetic number, because the mean of its divisors is an integer number (295820359313439).

Almost surely, 2^{591640718626877} is an apocalyptic number.

It is an amenable number.

591640718626877 is a deficient number, since it is larger than the sum of its proper divisors (1).

591640718626877 is an equidigital number, since it uses as much as digits as its factorization.

591640718626877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1706987520, while the sum is 77.

The spelling of 591640718626877 in words is "five hundred ninety-one trillion, six hundred forty billion, seven hundred eighteen million, six hundred twenty-six thousand, eight hundred seventy-seven".